Mark Cerny shows off Knack on Late Night with Jimmy Fallon

Mark Cerny, lead architect of the PlayStation 4 and Sony executive, took the stage at Late Night with Jimmy Fallon last night to show off the PS4 and give a gameplay demo of Knack. Fallon got his hands on the controller to play an ice level.

Cerny follows Microsoft Studios boss Phil Spencer, who appeared on the show on Monday.

Watch the full video below.