This is why stumble upon is such a vital tool - sometimes, at some point of the day - you just need to get a smile on, regardless of what made you frown in real life.
Sample funny stuff:
Air port sign for landing airplanes in Chengdu, China
To be or not to be.... that is a question... wait, what?
Tastes so heavenly, you'll need to repent.
Bad Chicken! Spank that bad Chicken!