Unsurprisingly, an overwhelming of those incidents happened at weddings. 
pop
I see your wedded people and raise you goats.
NEVER lock your knees.
Dude off the red altar had to hurt. Along with the last dude who ate dumbells for lunch.
THIS!
Probably one of the most common causes for people passing out, I remember numerous times people passing out in formation for doing that.
Some of those were brutal
LOL at the teacher passing out and the white screen rolling up like “ok shows over kids”
Fun fact of the day … KK has never fainted. Been KTFO’d a bunch of times, but never fainted. Good thing casue it looks like it SUCKS
Ive been locking my knees all my life and never heard of it relating to passing out.
Googled it and seems like there is quite a debate on the matter.
While it’s common in certain schools to be told not lock them, medical community struggles to justify that mantra.
I just thought if you locked your knees and happened to pass out the fall would be more of a “tree in a forest” rather than “a building collapsing on itself” as where the former would most likely lead to a higher risk of your head violently bouncing off of something.