I am always losing things from my beading tray. It doesn't bother me too much if I lose a bead here or there, I usually find it later. But sometimes my needles go flying out of my hands and I can't locate them.
Needles are pointy things, and they aren't fun to find with your bare feet when you step on them in the carpet. The worst time, though, was when I dropped one in my bed one day while I was beading in bed.
I knew I had dropped it, and I looked and looked for it, but couldn't find it. Finally I gave up, thinking maybe it fell on the floor and I'd find it later. I actually did find it about four days later, sticking out of my comforter. Luckily it didn't stick into me, I just happened to brush over it with my hand.
The dangerous hobby of beadweaving, haha.