Whenever I laugh really hard this happens. I'll end up falling out of my chair and rolling around.
Story time~
One time i was with my sister and she said something so funny to me because I kicked her door in screaming "THIS IS SPARTA!" and she got so scared and said "I just **** my pants!" And i started laughing so hard and suddenly that I fell to the ground with the LOUDEST thud right infront of the fridge. And her mom just.. Stared at me.

