Nick Heidfeld and the Medical Car: Interlagos 2002
This one lacks the "spectacular" qualities of the others, but probably made me cringe more than most of them.
Enrique Bernoldi crashed heavily in free practice, and, as is normal at such incidents, the Medical Car arrived at the scene to ensure he was OK. The session was red-flagged (stopped), but Nick Heidfeld wasn't paying attention and was ill-prepared for the scene he came across on exiting the chicane.
Fortunately, Medical Car driver Alex Ribeiro waited a few seconds after opening the door before climbing out.
Everyone was OK, though Heidfeld's ego no doubt suffered severe bruising.