Excellent point. Multiplanar training is pretty easy to incorporate and will add a little extra "ouch" to your killer workout (which I have yet to try....). Try adding in any rotational exercises. Personally, I love the single arm power pull. However, the high torso rotations, oblique crunches...

You should check out the video It's original and uncut.

Below is myself-kicking off the challenge with 32 Atomic Pushups. I welcome all challengers.