James Corden illustrates the dangers of accidentally calling the IT department when you really wanted the I.T. department.

James Corden offered an important public service on last night's Late Late Show: be sure you're clear when calling for I.T. help...you might get stuck with IT instead! Corden plays a hilarious and not at all murderous Pennywise in this sketch from last night's show. It is the #1 movie in America after debuting last Friday and doesn't show any signs of slowing down. Get out there and see it on the big screen!