When Sieger runs into his girlfriend walking her dog, you see Sieger's team logo on the left side of his t-shirt, but in the next shot, the logo has flipped onto the right side of his t-shirt due to it being a reversed image.
During the bathroom scene between Sieger and Eddy, as Eddy stands at the sink, the reflection of the top of a crew member's head is visible in the mirror for a second or two before Sieger moves in front of it.
When Sieger and Marc talk about their families and get up to go eat sorbets, you can see the microphone attached to Marc's back under his shirt.
In the camp bunkhouse scene as Sieger lies in bed awake, a shadow of some camera equipment creeps across his left arm as the camera moves on the slider.