An aged whiskey is going to pack a punch that puts all modern bottles to shame. That's just the way the world works -- and the same goes for metal. Nothing compares to the wall of amps and hangover snarl of Motörhead. Forgoing any focus on the expected classics (ie. 'Ace of Spades'), the British trio laid the late-night audience of Conan O'Brien to waste with 'Get Back in Line' -- one of the most unforgiving middle finger to sky anthems off of the band's newest 'The Wörld is Yours.'

Afraid of offending his ever vigilant mother, O' Brian passed off saying the name of the documentary film 'Lemmy: 49% Motherf---er, 51% Son of a B---' -- which focuses on the pure rock 'n' roll frontman/bassist Lemmy Kilmister -- to co-host Andy Richter.

Watch Motörhead Perform on 'Conan'

Motorhead are currently on a US tour in support of 'The Wörld Is Yours.'