Jean-François Pilâtre de Rozier (French pronunciation: ?[??~ f??~swa pil?t? d? ?ozje]) (30 March 1754 – 15 June 1785) was a French chemistry and physics teacher, and one of the first pioneers of aviation.
He and François Laurent d'Arlandes made the first manned free balloon flight on 21 November 1783, in a Montgolfier balloon.
He later died when his balloon crashed near Wimereux in the Pas-de-Calais during an attempt to fly across the English Channel.
He and his companion, Pierre Romain, thus became the first known fatalities in an air crash.
He also risked himself while researching the flammability of hydrogen: in "A Short History of Nearly Everything", Bill Bryson writes "In France, a chemist named Pilatre de Rozier tested the flammability of hydrogen by gulping a mouthful and blowing across an open flame, proving at a stroke that hydrogen is indeed explosively combustible and that eyebrows are not necessarily a permanent feature of one’s face."