Well, I'm not sure if this idea has been done before, I did a search and came up with nothing, so if it has, I'll apologize in advance.
So, the idea is to enable the pickaxe (or maybe some other tool, or even a new one altogether) to be used to slow or perhaps even stop you from falling. If you were near any sort of vertical surface and falling, you could use it to dig into it, say, at the cost of some durability. Maybe twice the cost of mining with it, I dunno. Alternatively, I thought maybe you could do the same to climb with the pickaxe, up a vertical face. At the expense of some durability, give yourself a boost up a few blocks more than the normal 1 block ascension, and you could do this multiple times, provided your pickaxe doesn't break, before hitting your surface...so it'd be sort of like climbing.
I dunno, I thought it'd be a neat little addition. Hope it's at least semi-original. I know there's Mods that do things similar, like the hookshot. Anyway, hope it's well received :smile.gif: