Sometimes I make violent hand gestures like bringing my fist down all of a sudden... I'm sure you know what happens next.
Here's another one. I was fresh from the shower, combing my hair in my room (in the second floor) and I stood by the window so I could be closer to the light from outside. Now the blinds on the window weren't closed and I didn't realize that there was a guy on the roof painting the bars on the window. Man that shocked me to death.