Will Arnett’s gravelly voice has defined some of his most beloved roles: it made his bombastic doofus G.O.B. into Arrested Development’s MVP, it turned him into a worthy rival for Jack Donaghy on 30 Rock, and it perfectly suited him for the role of the Lego universe’s Caped Crusader. As the star of The Lego Batman Movie, he brings a certain actorly gravitas to every punch line, and the best part is that he can take that skill with him anywhere. Trying to quell a dispute between his kids? Batman lays down the law. And in a new segment from the BBC Radio 1 station, he puts his voice to good use once more, as a prank on an unsuspecting toy store.