Hey yeah, forgot about the Goliath. Originally intended to blow up pillboxes and such, but naturally if you're about to be over run by tanks you might as well try your own baby tank to get them.

Or how about those Tank dogs the Russians used. they trained them to fetch food from under their own tanks and then let them loose on the battle field in front of the german tanks. Hey, to a dog all tanks look the same especially where food is concerned. Unfortunately nobody told the dogs they were carrying a few pounds of explosives on their backs.

And for us who like the stg44 how about the krumlauf (I think it's spelt like that) attachment that let you fire around corners. Neat.