Signal 2

I was recently involved in an accident and hit in the rear bumper. Cosmetically it wasn't too bad and I've got a good shop handling that. But one of the fluid filled subframe bushings burst which gives me a little cause for worry. In addition to the obvious repairs, both of the upper bushings will be replaced and a four-wheel alignment done. Is there anything else that is particularly vulnerable in a rear end collision that I should have the shop or mechanic check? I'm not trying to screw the insurance company, but then again I don't want to sign the paper saying the car is fixed only to find problems a few hundred miles down the road. Thanks, Jim