Panic Room
Rich people go to a lot of extents to protect themselves, and home panic rooms to protect themselves from home invasions are more common than thought. However, when the movie Panic Room was made, someone had the great idea that of Jodie Foster’s character dropped to the floor after lighting off a propane canister she would be safe. This person apparently didn’t take chemistry or physical classes. Otherwise, he or she would have known propane is heavier than normal air and the canister would have fallen to the floor as well, roasting Foster to a crisp.
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