This one time when i was 10 or 11 me, my aunt and my little brother (6 years younger) played hide and seek. We were at my grandparents house with all the lights off. So when it was my brothers turn to count I hid in the closet and when my brother came to find me he opened the door, I screamed and grabbed him. Now I feel bad because he got Scared and peed on my mom's pillow, and age still uses it.
At my house we always have the shower curtain closed in the bathroom. My little cousin (4 yrs old) was over and I told him there was a monster hiding behind it and it would eat him...later he was too Scared to even go in there with his mom so he crapped in his pants...no regrets...
Yesterday I taped life size pictures of Robert Downey Junior outside the windows to freak my family out, my dad saw it and fell on the floor Scared to death! LOL
When I was 8 I spent the night at my friend's house and I woke up at like 3 am and I was so Scared to go to the bathroom because it was really dark so I peed on him... And then he woke up when I was only like halfway done and I just... continued. Then he cried and told his parents and yeah we're still friends. :)