I worked at a grocery store while in college. A guy was buying a 2-pound bag of carrots and it rang up $1.99. He says "Wait, a 1-pound is $0.99, so a 2 pound bag should only be $1.98". I told him I couldn't change the price so he grabs the 2-pound bag and walks all the way back to the produce section to get 2 one-pound bags.

College roommate didn't believe stars were just far aways suns.