If somehow you don't know already, I am trying to write a due South Choose Your Own Adventure book. A surprising number of the "you fail" endings in these books are a bit lethal.
I found a list of endings from the most notorious COYA book of them all.
Yes, I meant it, notorious.
Then the silence is broken by your screams as knives appear out of nowhere and bury themselves in your backs.
That ending was also illustrated.
It's up there with all the horrifying disturbing stories kids write quite happily.
Last week, I had a girl who told me there were monsters under the bed that crawl out from under the bed and steal your eyeballs because they haven't got any.