Let me start
Jumping off a roof with a long 25 foot pool inbetwen your legs when the pool is only 20 feet wide, yes it hurt quite a bit.
Tieing myself to back of a car on a downhill slope, forgeting the need to stop. With roller blades.
Lifting my shirt up at airport sercuirty and telling the guy I don't have any c4 strapped on.
Me and my friend taking the 10 HP engine off a homemade go-kart and sticking on a massive 75 HP, the thing went 40 MPH on a 10 HP, mutliy the affect by 7.5 and you got yourself a bad exp.
Me and my cousin playing with fireworks in a dry corn field, you can't live until you've burnt down 200+ arces of farmland and a barn in the process
A few but perfer not to mention.