In the "mind battle" during the dinner scene between Barry (Steve Carell) and Therman (Zach Galifianakis) you can see Therman grab an imaginary grenade from the cleavage of Robin (woman in the purple dress portrayed by Andrea Savage) and throw it at Barry. As the scene cuts over to Barry, who catches the grenade, you see him do so right next to Robin, who should be on the other end of the table from where Therman threw originally it.