I broke two boards by abusing them - one by doing 180 turns with all of my weight on the nose, grabbing the tail, the other by putting too much weight on the tail when landing jumps.
I broke three boards from Aggression / Volant (the company changed names after I broke the second one), because the boards were crap. They lasted 3, 4, and 1 day, in that order, and I wasn't doing anything that merits breakage. The company kept saying they'd never heard of anyone breaking their boards before, which was kind of funny when I called about the third one.
I broke one board from CustomCraft, who instantly apologized, said they knew when it broke, and sent a new one, which has held up just fine. (I would buy from them again if I wanted another custom freeride board, they're good people.)
So, abusive riding can do it, and bad construction can do it. In the latter case, an honest builder can set things right again. In the former case, well, I deserved it.
