Beware: Testament isn’t for the skittish or faint of heart. They have been bringing their brand of thrash metal to headbangers around the world for 20-plus years and they’ve done hard time at the infamous Alcatraz prison.

OK … so they didn’t actually serve time there or anything. When we say “hard” we’re referring to how fast and furious our Artist of the Week rocked on The Rock to show you what life would be like behind bars if they were running things.

It’s a fitting location, considering Testament and Alcatraz both call San Francisco home. In fact, the band got their start in the Bay Area. They released their first album, The Legacy, in 1987, running in the same circle as fellow metal legends Metallica, Megadeth, Slayer and Anthrax.

Over the years Testament’s lineup changed but their sound has always remained the same: metal, metal and more metal. Their 14th album, The Formation of Damnation, was released last month and features all but one of the original members. Older and wiser, Testament go back to their roots on this album, delivering pure, unadulterated, chest-crushing metal.

So, think you can handle them? Find out just how hardcore you really are. Watch the classic “Practice What You Preach” video and Testament’s Artist of the Week clips below — you can watch them all here. Then tear through some behind-the-scenes photos. Before you know it you’ll be wishing they’d lock you up and throw away the key.