Airflow. I think as soon as you hit ~14% butane/atmosphere, you’re just a water heater pilot light, dropped pipe on a concrete floor, or lighter left in your pocket away from combustion.
Career advice: be selective of who you work with. Good values and safety sense are everything.
Definitely not. Not even close. Really smart people make silly mistakes all the time. Someone being developmentally disabled has no bearing on whether they would cause a lab explosion.
Ignorance, however, much like your response, may be a reason, but retardation (which literally means the action of delaying or slowing the progress or development of something) has nothing to do with lab explosions.
Hydrocarbons usually have higher density of air, so if the lab or storage is not well ventilated with proper system (bottom ventilation), stratification can occur and then very easy to get an explosion. My own lab exploded, even if my sense of safety was very high at the time of the explosion. Im lucky still alive (20 days of hospitalization, 20% of my body with severe burn), 2 my employee died and a third will be permanently injured. A lot of factor played a role in the accident (one machine malfunction) and a messy/stressful situation. Im as the owner, im under investigation as responsible, and of course will accept all the legal consequnces if mistake by myself will emerge. Im in the game since 2017 and the first accident come after 4 year of professional job with tragic consequence.