Once helped out a couple of kids who went into the windscreen of their little car when they hit a much larger sedan in the front. We saw it happen in front of us, so it was a no brainer to help and be witnesses.

Mostly it involved attending a little to some facial injuries involving glass -- they were lucky, could have been much worse -- and trying to comfort them as they were in a major state of shock--and trying to get to a phone -- this was before the age of cell phones -- to get the Emergency personnel and police there.