Eavesdropping
Overheard at the grocery store:
Should we get soap or frozen waffles?

(I didn't know they were interchangeable.)
.....
Overheard at the gas station:
Man on cell phone: Yeah I know I said I was sick yesterday, but today I really am sick.

(He was wearing shorts and had the top down on his convertible.)

.....
Overheard at the shelter:
Woman 1: Did you know that Donna got engaged?
Woman 2: To Jack?
Woman 1: No, Tony.
Woman 2: Who's Tony?
Woman 1: Her fiance.

(Um...duh!)