Pfft. I ride tempo at 400 watts. My sprint, when dialed in correctly, tops out 2800 gigawatts - but that is after a long race.

But seriously, some pros put their equipment through a serious beating. I can't remember who / what team, but I remember reading that they were flexing their bottom brackets so much that their chain was dropping. Might have been Quickstep with their new Specialized stuff.