When Wayne Wayne says that he's "gonna take Big Time Rush to the next level", his hands go from up, to down, to back up again.
When Kendall is talking to Griffin after trashing Gustavo's studio, Wayne Wayne is nowhere to be seen, but in the next scene, he is shown in the area behind BTR, Griffin, Gustavo, and Kelly, being dragged off by security.
When Wanye Wanye is talking to Kendall outside next to the pool, when Wanye Wanye has his sunglasses on you can see the stage lights reflecting on the sunglasses.