Don't know if this counts but I was arriving into Brandon Manitoba once and suddenly there was a massive fireball and plume of black smoke alongside the runway. Figured the worst and prepared to divert elsewhere. Turns out it was a regular fire-training exercise, but amazingly there was no mention of it in the supplement, the ATIS or from the field controllers. Just business as usual.
Another time flew commercial to Midway Atoll where prior to each arrival they drive a truck up and down the runway to shoo away hundreds to thousands of Laysan Albatross.
Closer to home we were climbing/ skiing on the Pika glacier in the Alaska Range and had a pick-up arranged with Jay Hudson. The 4' of fresh powder snow was more than Jay had bargained for, and despite our packing a runway his 185 got pretty buried. Once freed (that's a story in itself), Jay elected to take off empty and come back for us the following day. Paul Roderick laid some tracks for him, and then flew cover, telling Jay where the crevasses were so Jay could slalom around them on his lengthy down-glacier takeoff run. (Jay used to be one of the go-to guys for slinging airplanes in crevasses, so it could have been extra problematic if he'd been the one in need of slinging.)
-DP

