We're told that the prankster in this video, who hopefully still has a job, is Kelly Park, son of NHL Hall of Famer Brad Park. He promised the CFO of their company that he would "prank" him should the Bruins knock out the Habs in the first round. They did, somewhat dramatically, and Park chose to overhaul his boss's office with the smug, blinding yellow of the Boston faithful. So that's where all of the useless shit you see in team stores always ends up.

[H/T Carl]