In 1999, the world almost lost Martin Lawrence when the actor collapsed and fell into a coma outside his L.A. home due to severe heat-related exhaustion. Lawrence's condition was so serious that for several days he required a ventilator just to breathe, and there was talk of him potentially suffering permanent kidney or brain damage. Luckily, he went on to make a full recovery.
As Lawrence would later admit on Conan, it all happened largely because he chose to work out while wearing a big plastic suit in 100-degree weather to try and get in shape for Big Momma's House. If the image in your head right now is of Lawrence running in the full Big Momma outfit, we're sorry to ruin your day by saying he was actually running while wearing a heavy plastic suit below his clothes—kind of like how Bradley Cooper's character works out in Silver Linings Playbook.
Curiously, news sources from the time didn't seem to pick up on this, and criticized Lawrence's decision to get in shape, arguing that since he'd spend most of his time in costume, he wouldn't have many opportunities to show off his abs. You know, because it's not like you need to be in shape to walk around in an 80-pound fat suit all day.