Many of you if not most, probably know of this website. If not; It's a site of posed and rotatable 3D Human models featuring what's underneath the skin. Quite handy for learning muscles but a cheap substitute for figure drawing. (But then again, cheap isn't always bad; it was very nice to sit down after a long day at work and sketch up probably a good 100 of these guys with two of my coworkers Jason Kim and Dillon Thompson.) Make sure you check out the tools section.
Anyhow, here are a few of my favorites from the batch.
Just around 1 Minute each.