So two chunks of asphalt walk into a bar. They sit there, downing shots and bragging about how hard they are. "I'm so hard I break jackhammers" "Nah mate, I'm so hard I give road rollers a flat tyre!"

A bit later a chunk of pink asphalt fronts up to the bar and orders a beer. The first two get very quiet and slink off into a corner. Once the pink asphalt has left, the other two start getting noisy again. The bartender asks them why they weren't so vocal while the pink asphalt was there.

"Man, we're hard, but that pink guy, he's a cyclepath!"