Whenever you're in a pickle, or literally in a pickle, and you ran out of sharp or good things to use, improvise
Some examples are:
When you are having a Nerf dart battle with some friends and you ran out of ammo, use random objects to throw at them from afar!
If you are sewing or knitting something and you run out of thread, take down a curtain and use that!
When you can't get something out of a tree, throw heavy things at it so that it falls!
If you can't find socks, use something like peanut butter!
Next example should be shown above!
If you have at more improvising things, just comment!!!