To answer the question, though, of course it is. All you have to do is use the metal to complete the circuit. What fuses provide is safety. The actual conductivity would depend on whether it's actual tin, or if WHAM/the game is using the colloquial "tin cans" to mean aluminum (I think the latter is more conductive). No need to be MacGyver. Poor folk do this a lot (except then their houses burn down).
P.S. Guess who's probably freaking out and/or dead from lack of oxygen right now?