I think it would be cool if you could do tricks with the butterfly knife, or if there was an animation where you open it when you equip it, similar to cs:go.
I also think it would be cool if when you stab someone the knife stays in them (or their dead body) and you would have to pull it out, you could decrease this chance by upgrading a skill.
There’s literally nothing the butterfly knife can hook onto in order to get stuck (@Whistleblower the logical explanation why it is a bad idea)
Unlike huntsman knives, butterfly knives don’t have a hook to hang on to something inside the person. It just slides out like it did sliding in, except with less skin resistance
Maybe arrows and thrown weapons could get stuck in their targets, but I’d rather not have players disarmed in videogames, since the disarming abilities would be OP and annoying, not to mention the player wouldn’t be able to feel that they’re losing their grip, and there is nothing they could do to fix that.