My friend was at a school gathering in India and didn't realize that the balloons had been filled with hydrogen instead of helium (save on costs?). He went to

My friend was at a school gathering in India and didn't realize that the balloons had been filled with hydrogen instead of helium (save on costs?). He went to pop one with a lighter and the whole bunch of 70 went up in flames and burned the hell out of his body. Moral of the story... be careful with hydrogen balloons.