Why did the man fall off his bike?
Because someone threw a refrigerator at him.
Why did the man fall off his bike?
Because someone threw a refrigerator at him.
Alright, listen up, buttercup. The joke is funny because it's unexpected. You think the dude fell off his bike for a normal reason, but nope! Someone chucked a whole refrigerator at him. It's funny because it's so random and ridiculous. You probably don't even own a bike.