Pearl Jam closed out the week of Pink Floyd cover performances on 'Late Night With Jimmy Fallon' last night.

It was a week that saw indie rock acts like MGMT and country superstar Dierks Bentley all tackling and retooling Floyd classics. Foo Fighters even showed up and performed alongside Roger Waters himself! It was a Floyd-filled week capped off by the mighty Pearl Jam, who offered up their wholly somber take on the, well, whole somber Floyd classic 'Mother.'

Eddie Vedder further dropped his vocal register and went low, low, low when he asked, "Mother do you think they'll drop the bomb?" From that opening salvo on, it was a contemplative couple of moments for Pearl Jam and they were completely loyal to the powerful original yet their live rendition still sounded like Pearl Jam.

Vedder looked super serious while singing Waters' words. He was clearly in a zone and his focus and his concentration could not be broken, even with cameras on him and all. He's used to it at this point! He was, after all, singing a lyrically heavy war anthem.

Pearl Jam covering Pink Floyd is something you likely won't see again on late night TV, amidst jokes about celebutantes and other pop culture happenings, any time soon. Kudos to the music bookers and talent executives at Fallon for coming up with a brilliant and creative way to position their musical guests and performers for an entire week.

Watch Pearl Jam Perform Pink Floyd 'Mother' on 'Late Night With Jimmy Fallon'