My can opener broke mid-jalapeño-opening the other day. My boyfriend said it was VERY IMPORTANT that we get this can open for the crockpot chili he was making, but neither of us wanted to get dressed and walk to the store to get a new can opener.
We didn't have a churchkey, but we had one of those corkscrews that also have a knife that flips out, and the knife was a very tough serrated steel.
The serrated steel punched through that can like a boss. I got the whole thing open just sawing through.
I don't recommend it though. It was pretty dangerous, now that I think about it. Gotta use a lot of elbow grease and if I'd slipped I could've seriously cut my hands.
Note to self: buy a new can opener already.