>>32751
lots!
First there's the dare challenge… for example two contestants each insert a water hose into their butt/pussy and turn themselves into waterballoons. Whoever pulls out first loses…
the rules don't explicitely say if bursting counts as win or lose, but it might be messy ;)
variants possible with self impalement, cutting, strangling, …, …

very closely related the attempt to one-up each other on activities that get increasingly dangerous/deadly. Including self mutilation, cutting of limbs, etc… or inserting stuff leading to self impalement on thicker and thicker pins/nails/spears/poles/…


Or alway popular among kids, playing doctor: measure each others fever, probe orifices, conduct a cesarean, open heart surgery or the ever popular life dissection…
variants include playing "morgue" (coroner, pretend corpse) or "prison" (executioner / dead man/girl walking )

More "suicidal" is good old exploration/curiosity maybe over questions such as "if your head is cut off, you're instantly dead" "no! that's not true, heads stay conscious!" "I don't believe that"
"Ill prove it. I'm gonna cut my head of and then you ask me stuff, I blink once for yes and twice for no!"

Or also "its impossible to snap ones own neck" "no, it isn't!"…

Yet another popular thing is reenactment of magic shows. The getting sawn in half trick is always so fascinating. If one manages to do that to themselves: extra kudos.

"No, wait, I think you need to use a rope and squeeze your waist really really tight. then cut between the ropes, otherwise all your squishy things will come out!"

(might ease render effort ;) )

U could have 2 play hunter and deer, butcher and pig, … so many fun games that can go horribly wrong :)