From CoolTools: FuBar Demolition Tool
The FuBar is a single cast piece of high carbon steel that looks like a prettied up hammer. One end has a hammer and a tearing, armour-penetrating beak, while the opposite end has a conventional pry bar and nail puller. You can use it to drive nails, but what it really excels in is F’ing things up beyond recognition — hence FuBar. You hit something with the axe-like end until it’s weakened, then hit again, twist to pry, and CRUNCH!
Personally, I find this thing FREAKING AWESOME, for no other reason than the thought that went into a tool specifically designed to break stuff.