Bail Gear on Second Coming (Looking Glass)

I was wondering if anyone knows the story behind some gear left on Second Coming at Looking Glass on Sunday. There was a slung nut placed around the first pitch crux, and the party rapping while I was leading said they'd found a complete gear anchor at the belay. We were thinking there must have been some sort of injury accident for the climbers to leave so much pro.

None of us could clean the nut, but I have the sling and biners and will return them if I find out who left them. I'm sure the guy who cleaned the anchor will do the same (didn't get his name).

I hope nobody was hurt seriously. If you left the gear or know what happened, let me know.

JL