There are two cans of corn you'll have to destroy. The first one is thrown out by the prospector who wants you to find his minecars. For that one, just stand next to the can and wait for him to throw a stick of dynamite at you. The blast should destroy the can if it gets close enough.
The second can is in the island segment. You'll find it at the opposite end of the island from where you start, next to the box of crackers. To destroy that one, place it between two of the explosive barrels you use to drain the water from a segment of the island cave. When they blow, the can will be destroyed.
XBL: Malevolent Fish // PSN: MalevolentFish // NNID: Malevolent.Fish "But why is the rum gone?"
I never thought about the second can of corn... I've played through this game twice and only destroyed the first can of corn... I thought it was a glitch... On my third play I'll have to remember the last can...