I do because it hurts my ears and makes me jump lol.
The simplest solution involves an electric motor and a crank driven plunger. Pneumatics will give you trouble because of compressibility. Hydraulics is way too expensve a soulution for this problem. Build the device so that the can lies horizontaly. Put a slot at the end opposite the crank for the crushed can to fall through. Build a magazine (like the ones that hold cartriges in a gun) to place on top. Feed the cans into the top of this so that when the plunger retracts, another can falls into position.
Bumps will trigger ABS. Stop driving off bumps.
