Keeping balance in your exercises is extremely important, like dips and pull ups, pushups and rows, etc etc. One that interested me was the candlestick (and by extension, body levers). The natural antagonist exercise seems to be the locust position in yoga, which is essentially a candlestick on the front, arms under you to begin with to help push up. I managed to get one that felt completely vertical my first time trying it, and it felt pretty good for my back.
I saw somebody performing one on a vault through one of the links on the beastskills website (either that or he missed his mark and faceplanted the vault), so I started wondering if it was an actual exercise used in gymnastics conditioning?