Idea #4: Man is running from an over-zealous female stalker. He turns his head to look over his shoulder, trips over a rock, falls flat on his face, gets back up and runs away. I particularly like this one. I referenced the run cycle from Richard Williams' The Animator's Survival Kit page 177. I added the head turn, the trip, the faceplant and getting back up. If I decide to do this one, I will have to record myself or someone else brave enough to attempt this action.