The Workshop Black Hole
You drop a bolt.
You hear it hit the floor.
You hear it bounce.
You hear it bounce again.
Then...
Silence.
You spend 20 minutes looking.
You move boxes.
You move tools.
You get a torch.
You get on your hands and knees.
Nothing.
The bolt has left this dimension.
Strangely, it will reappear six months later in the middle of a clean floor that you've swept at least 100 times.
What was the smallest thing you've dropped that instantly disappeared forever?