In the scene after Robbie's breakup with his fiance when he has top play another wedding the following weekend, he is in the dumpster after a horrible failure as the wedding singer at that wedding. Each time they pan away from him and then back, the trash is in a different place and Robbie is in a different position. There is a large ring thing that looks like a piece of floral arranging equipment that is in a different place every time they shift back & forth!