Toes, when she was younger, attacked my foot like that once as I was sleepily heading down the hall. I turned on the light to see what was going on, and saw I nearly stepped, barefoot,onto a wasp that had somehow gotten in and was stuck on the sticky tape that, at the time, was along the edges of the hall, with some of it stuck out into the hallway, covering the trim as we'd just painted.

Stingers in the foot don't feel good. Long story short, grabbed a swatter and squished the wasp, and once it was disposed of, gave my kitty lots of scritches.