A while ago I posted a link to "B-Boy Junior"'s breakdance video. He's the one that had the crazy bodycontrol and strength. Well here is another video where its pretty much all leg free push-ups and static holds. The amount of core strength that must take is amazing.
Here is a video of another breakdance. Noting to do with strength but its an old, but badass none the less video. I've never seen a white guy break an pop like this. When he starts of you're like 'WTF is he doing" then all hell breaks lose. A+!