I was sitting at a stoplight on my way to work this morning in my '02 TJ when suddenly -- BAM -- I'm hit hard from behind... enough to daze me a bit. Visions of my TJ's smashed rear-end immediately came to mind, but when I pulled out of traffic to assess the damage, there was _nothing_. I looked close for any sort of bent metal or damaged paint, but there was nothing, just some paint on my receiver hitch from his license plate and an imprint from his hood emblem in the dirt on my spare.
No airbags deployed, so maybe it wasn't as hard as it felt. Yet his minivan didn't not fare as well. The hood was crumpled, bumper cracked, and his plate had a 2" square hole from my receiver hitch right through it.
An accident was not something I envisioned happening, since I'm a reasonably "sane" and watchful driver...So much for that; it sure catches you off guard.
Anyway, it was nice that the TJ took it so well.