93 Civic DX sedan. It was a collision hard enough that the drawer
beneath the radio opened and sent the coin change I keep there flying.
As I got out, I thought I would find the Civic's rear would be partly
flattened. I was amazed that externally, the bumper only showed
scratches. The exhaust system is intact. Is the integrity of the foam
etc. in the bumper compromised, though, after a hard rear-ending?

The police made their report. I spoke with my insurance company last
night. While only once before (on another car 20 years ago) of several
rear-endings have I pursued a claim, this collision was so hard that I
am concerned.