Certainly rare during an eclipse at any rate -
gizmodo.com/holy-crap-the-moon-was-struc...during-th-1831950105
I had a camcorder running at the time but not good enough resolution to catch anything.
There doesn't seem to be an exact moment of totality due to atmospheric irregularities, but it was within some seconds of the impact anyway. Quite a coincidence.
Did see another report suggesting a second impact some minutes later, but nothing confirmed.
Finbarr.