The verb Chocar gets used frequently in my neighborhood. Any sort of crashing into something, people, cars, etc. Today, for example, yo choqué con un letrero y caí en mi espalda en el malecón. It's the truth. My Spanish isn't perfect, but I think that would get the meaning across that when I was walking on the malecón this morning here in San Juan, I was lost in thought and power-walked my face into a sign and fell backwards onto the cement. Ow! Only a little blood, but a real "wake-up" to watch where I'm going.