I'm interested to find out what turns up to be useful from Parkour in a game and how "Combat Parkour" will evolve around the equipment we carry. We might even start using specific weapons and equipment that make the use of Parkour more functional. Maybe this'd be a good testing ground for Juxta and Demise's Parkour training/battle armor.
So far the most useful single move I've gotten to use is the gate vault. I've done it a few times and it works out great with your gun across your back or on a three point harness if you get the gun over before you flip. I still need to work on landing with the gun in my hand. I recommend trying it with a cheap gun the first time.
I imagine tic tacs will be just as useful when I get an opportunity to use one in a game.