i have a can of mushroom soup on my counter here in my room. a few days ago when Mom was making soup she pulled the tab off. i can maybe hit it with a hammer on the side and see if that will split the seam in the top or just hit it on the top with the hammer and use a small piece of wood... the regular can opener won't open it. but there are other options too. pliers, dremel tool, welding torch (pre cooked!), etc. (no, i don't really have a welding torch)... m80s (i don't have those either). put it on the driveway and run over it, etc...