I saw a HUUUUUGE truck down-town, and someone had stuck a little bumpersticker under the truck on the suspension or the frame or something where the owner standing behind the truck wouldn't see it, but someone farther back or lower down would.

It said "Big Truck, Little D*ck."

I imagined some radical pedestrian or cyclist armed with a pocketful of those stickers, wreaking havoc in a shopping mall parking lot....