Quoted from frolic:I still don't know yet how to start the crossbow, I've had it only come on a few times, it is fun but fast so I need more time with it. Unlike ACDC where you are aiming at the same drops, this one lights up all the crossbow inserts on the game and any of them are targets.
It probably isn't integrated yet. On the Pro, you need to knock down all the drops when "Weapons" is lit. This lights crossbow on the right ramp. You hit the right ramp which lits 3 different shots, one of which you must hit on your next shot, or they just turn off. Hitting one shows a nice DMD animation with a walker taking an arrow to the head and awards 2 million points.