Science demonstrations are meant to engage, inspire, and educate. However, some of the most dramatic and attention-grabbing experiments also pose significant risks. One such example is the Whoosh Bottle experiment—a demonstration that involves igniting alcohol vapors inside a large plastic or glass bottle (DO NOT USE GLASS! DO NOT REUSE BOTTLES) to produce a sudden "whoosh" sound as flames shoot out.
Recently, an incident at an Indianapolis high school resulted in injuries when a Whoosh Bottle demonstration went wrong (Read the full news story here). This is not an isolated event—many similar incidents have occurred across the country, including accidents involving the Rainbow Flame demonstration, which has led to severe burns among students and teachers.
Despite the known hazards and documented risks, these experiments persist in classrooms. But perhaps the most alarming part is that many teachers who have been injured performing this experiment still continue to do it. A burned hand, a close call with a flame, or even an unexpected explosion should serve as a wake-up call—but often, these incidents are dismissed as minor or as "part of the job." The persistence of these injuries highlights a larger cultural issue in science education—one where engagement and tradition often outweigh thoughtful risk assessment.
But here’s the real question:
🔍 Why do hazardous demonstrations like the Whoosh Bottle and Rainbow Flame continue to be used in science education, despite decades of injuries?
🔍 And more importantly, how do we break the cycle and better support teachers and students when it comes to science safety?
Fun fact: Did you know that the National Chemistry Teachers Facebook group will ban you if you promote and share methods for performing dangerous demos like the Whoosh Bottle? And yet, they persist in schools across the country.
This Is a Systemic Issue, Not Just an Isolated Incident
Let’s be clear: this isn’t about blaming teachers.
Expecting individual educators to be the sole safety gatekeepers is both unrealistic and unfair. The real problem is that we haven’t built the right systems to support safer science education.
Take the Whoosh Bottle as an example. If your answer to "How do you perform the Whoosh Bottle?" is "Grab a polycarbonate water jug, add ethanol, methanol, or isopropyl alcohol, clear out a space, and ignite it," then you may be courting unnecessary risk for yourself and your students. When hazards are high and educational value is also high, educators need to rely on established processes and procedures to:
✅ Decide if the demo should be performed at all.
✅ Establish the necessary safety protocols to minimize risks.
✅ Communicate hazards and risks effectively to students, parents, and administrators.
Instead of treating safety as an afterthought or an individual responsibility, we need structured, proactive approaches that empower teachers without putting them in impossible situations or leaving them unprepared.
The reality of science safety failures in our schools is staggering. Just in 2024 alone, across the U.S.:
- 27 science-related incidents occurred in K-12 schools and colleges.
- 1 fatality—a tragic and entirely preventable case where a teacher contracted rabies after removing an infected bat from an art classroom (CNN).
- 29 injuries—ranging from chemical burns to explosions caused by hazardous demonstrations.
- $1,000,000+ in damages and liability costs—funds that could have been invested in safer equipment, training, and risk mitigation.
These numbers aren’t just statistics. Each one represents a teacher, a student, or a school community impacted by preventable failures in science safety.
The historical data reinforces this troubling pattern:
- Between 2001 and 2018, over 260 K-College lab incidents resulted in 10 fatalities and 490 injuries (U.S. Chemical Safety Board).
- LSI’s database shows over 511 recorded science lab incidents since 2000, with 303 injuries and 1 fatality occurring in K-12 settings alone.
- Many of these incidents stem from high-risk demonstrations like the Whoosh Bottle and Rainbow Flame, which continue to be used despite clear evidence of their dangers (Sigmann, S. (2018) "Playing with Fire").
The takeaway?
These aren’t isolated "accidents"—they are predictable and preventable failures of how we approach safety in science education.
And the worst part? The next major injury or fatality is not a question of if—but when and where.
It doesn’t have to be this way. Science safety doesn’t happen by accident—it happens through effective systems and training. If we want safer science in schools, we need clear policies, structured risk assessments, and better training for educators.
Until we make these changes, teachers and students will continue to be put at risk. And that’s a lesson no one should have to learn the hard way.
Final Thoughts: Supporting Safer Science Education
If we continue to allow outdated, hazardous demonstrations to be treated as "just part of the curriculum," we are failing our educators and students.
🔴 The burden should notbe on individual teachers to navigate science safety alone.
🔴 Schools and districts must take responsibility for proactive, system-wide safety measures.
🔴 Educators deserve training, resources, and institutional support to create a safer science learning environment.
Certain experiments have significant hazards and pose serious risks to students and teachers without proper precautions. If the hazards and risks are not fully understood, then these demonstrations are a non-starter. The decision to conduct high-risk demonstrations should not rest on an individual teacher but should be evaluated and approved by a designated science safety committee. Furthermore, this committee should be notified before and after such demonstrations are performed to ensure that proper safety measures are in place.
To establish a culture of safety, every science demonstration should be evaluated through the lens of The Four Critical Questions:
🔹 What hazards are associated with this experiment? 🔹 What could go wrong? 🔹 How are we prepared to handle these issues? 🔹 What protective measures are necessary to minimize risks?
By consistently applying The Four Critical Questions, we shift the focus from reactionary responses to preventative safety planning—ensuring that students and educators can engage in scientific discovery without unnecessary risks.
It’s time to prioritize safer science—not just for compliance, but for the well-being of students and teachers alike.
See video: After the Rainbow from the Chemical Safety Board: Calais Weber.
🔗 Want to learn more about how schools can improve science safety? Check out LSI’s Science Safety Program .
Citations & References
- U.S. Chemical Safety Board. (2018). CSB Laboratory Incident Data
- Sigmann, S. (2018). "Playing with Fire: Chemical Safety Expertise Required." ACS Chemical Health & Safety. PDF Available Here
- Clark County School District. (2015). Science Safety Manual
- CNN. (2024). Rabies Death of California Teacher
- U.S. Chemical Safety Board. (2014). Key Lessons for Preventing Incidents from Flammable Chemicals in Educational Demonstrations