She's Out of My League (2010)

Continuity mistake: During the scene by Kirk's parents pool, Kirk is begging his brother not to embarrass him. Dylan turns to put his back against the side of the pool and his left elbow knocks over a beer can. In the next shot, behind Dylan, he is between two upright beer cans.

mustangdaddy

Kirk: Stainer, I know you don't like her very much.
Stainer: Nooo, no. I hate her. In fact, the day you broke up with her I marked that down on my calendar as a day of rejoicement. I'm going to celebrate it with a cake with her face on it, but instead of eating it, we smash it.

Trivia: Prior to their first date, Molly, her sister, and Patty are shopping. The sister holds up a dress, and the consensus is that it is horrible. When Molly and Kirk go to visit his family, Marnie is wearing that very same dress.