The Shifting Gears season finale found a way to nod at Seann William Scott's comedy film with Ashton ... having to do it right before we would shoot something. It's anxiety. It's a real thing." ...

From left: Kat Dennings and Seann William Scott in 'Shifting Gears', Ashton Kutcher and Seann William Scott in 'Dude, Where's My Car?' ...