Tying off a piton
Sometimes a piton may stick out too far from the rock. If you clip the eye, you might leverage the piton and weaken the placement.
Or maybe the eye is rusted or broken and can't be used.
Solution:
Girth hitch a sling around the piton closer to the rock, which reduces leverage. This works better with some piton shapes than others.
Another option: put the wire of a stopper around the piton shaft. #CraftyRopeTrick for sure!