After his first foray into balloon flight resulted in zero animal deaths, Rozier concluded that there was no reason humans shouldn't be all up in hot air balloons also. With one unprecedented win under his belt already, he was able to convince King Louis XVI to allow him and a nobleman named Francois Laurent d'Arlandes to become the first human untethered hot air balloon pilots.
After several successful flights, Rozier figured that he was above the laws of physics and logic and decided to take a trip across the English Channel using what he dubbed as his "hybrid balloon." The balloon featured two compartments. One was heated by an open flame which was fueled by brandy, a fact historians have speculated was exactly as totally rad as it sounds.
Dad called it fuel for a reason.
However, Rozier decided to foolishly fill the other compartment with highly combustible hydrogen instead of the more reasonable choice, helium, just because that element wouldn't be discovered for another 50 years. Besides, who has time for determining an element's capacity for explosiveness when there are awesome hot air balloon flights to embark on?
Roughly 15 minutes into the English Channel flight, the flame and the hydrogen predictably found each other and joined forces to form a Voltron-like explosion. Surprisingly, the explosion wasn't fatal, but that 1,500-foot plummet to the Earth most certainly was.