Bumpers w/pneumatic cylinders

I've had this idea of placing pneumatic cylinders behind our bumpers (see below) for a few possible applications:

1. Shock absorbers: Add a bit of air to small cylinders, small enough to make only a small difference in bumper width from the robot, and use them as shock absorbers for collisions.

2. To use as a "defensive push": Basically, add the cylinders to the the bumpers, and when someone gets a little too close for comfort, we just launch out our bumpers. This could also be used to redirect another robot, or to assist in a pin.

What do you think? Is it legal?

Attachment 11133