I know this isnt really a comeback, but I went paint balling today, and this happened:
We were in the safety brief. There were two guys, this big army-looking guy who was taking the brief, and a marshal standing next to him. The marshal was a young lad, 20 or so.
So, in the middle of the brief, as always happens, a phone goes off. Then the guy taking the brief goes "oh shit, that's mine!" He looks at his phone, then at the marshal next to him, and says "it's for you, it's your mum!" So naturally everyone in the brief laughs.
Then he goes "Heh, she was fine when i left her this morning!"

xD