Video: I have this really fussy can opener that I always forget how to use and for some reason, I've never bought a normal can opener to replace it. Or maybe I'll just never replace it and use this neat spoon trick to crack open a can instead.
Basically all you have to do is give it a few good jabs to open up a hole and then slowly pry it open by moving the spoon along the edge. It's surprisingly effective. Dave Hax shows us how it's done in the video below. Of course, the can's going to be sharp as hell so watch your fingers if you do this.