After a low-speed parking lot encounter with a brick wall, the rear bumper on my e36 m3 has about a 1" gap from the body panel right above it, on the right wheel-well. It looks as if someone facing the right wheel grabbed the bumper and twisted it clockwise slightly. It's not rubbing on anything, and it doesn't look like it's about to come off, but it's a little unsightly.
Is there a trivially easy/cheap way to fix that?