Barney's big crowbar scene required a few tricks to pull off. First there's the one stuck in the machine, when Barney grabs that one: We remove it from the world and replace it with a different crowbar that was in Barney's hand the whole time. Both of these are purely cosmetic, so after Barney makes his tossing motion: We swap it out for a interactive crowbar. which then bounces to the ground.