I've only just discovered this:
http://youtube.com/watch?v=WzqLOA9wTzQ

This is an interesting looking game based on parkour free running. It's first person focusing on movement rather than shooting.

http://en.wikipedia.org/wiki/Mirror's_Edge

With such a heavy focus on movement, it is imperative to maintain momentum, which is done by an uninterrupted, fluid flow of actions, creating a chain of moves. Failing to string these moves together results in a loss of momentum, which can mean that Faith falls off or short of an object if a certain level of momentum is required to transverse it.