How to Get Oh, Baby! a unique super sledgehammer in Fallout New Vegas

At some point you'll find yourself in Jacobstown, a town filled with civilized Super Mutants and their counter parts, the Nightkin. You'll be asked by the local human doctor to check out Charleston Cave to find out why the Nightstalkers have been developing a natural stealth field. In the cave, however, lies a unique weapon called Oh, Baby! which is a unique super sledgehammer! In this video you'll get the location of the hammer and some info on the stats for the hammer itself.