Pullups, one of the hardest exercises to do?

You betcha! Especially when done correctly! Check out these variations and other superhuman bodyweight exercises! These guys definitely know where their lats, and abs are, and how to maintain high body tension! Awesome work and something to aspire for! http://msn.foxsports.com/video?videoid=a2205bb8-3ea2-411d-8c9d-114e48c58e0a&src=v5:share:email:uuids&from=email