After leaving Atomic Rooster in 1971, John Cann formed Hard Stuff. In almost no time at all, the band was signed to Deep Purple's vanity label, Purple Records. The result was Bulletproof, a total ass-kicker of a hard rock album that, although it didn't receive much attention, is an energetic slab of dirthead riffery with swagger and style in spades. I'm pretty sure you'll go ape shit over this one. Oh, and check out the guy on the top left of the cover...How fucking high is that dude? Nice work, bro.