*POOF*
Now I had a face full of mentholated talcum powder, some of it in my eyes, which is painful, and I was flailing around in a cloud of talc.
*COUGH* *HACK* *SPUTTER*
Half-blinded by the powder, I needed to clear the air so I could breathe, and so I opened the bathroom door to let more air in. The cloud of post-shower steam plus talcum powder shot out the door and up, where it encountered the hallway smoke detector.
*EEEEEEEEE* went the detector, whether from the steam or the talc, I don't know, but now I had a smoke detector going, I could barely see what I was doing, and I've just come out of the shower.
Fortunately, that's only a local smoke alarm, not a building-wide one. I was able to clear my eyes, grab my robe, get a step-stool, and disable the smoke alarm until the dust settled. No harm done in the end, but it was a pretty silly predicament.