This one made me laugh out loud. I think Bob found it originally. The video reminds me when I went indoor rock climbing with a couple friends years ago. While the owner was showing us the easiest to most difficult courses marked with different colors, he told us a story about how this huge weightlifter of a guy came in one time with his petite girlfriend.
They were both new to climbing. The weightlifter was boasting how he was going to climb all over the walls and show his girlfriend how it was done. However, he really struggled on the intermediate course. On the other hand, his girlfriend was climbing all over the place. Why?
Better ratio of strength to body mass. Watch these kids for a perfect example.