As the children are leaving to get to safety, Maya and Hanna are walking with their arms around each other, but they change position multiple times. First, they can be seen walking together with Maya on the left and Hanna on the right. However, in the next shot, Maya walks past Gus by herself and is then joined by Hannah, who puts her arm around her. In the final shot, their positions have switched so that Hanna is on the left and Maya is on the right.
As the kids use the rocks to cross the creek, the middle rock bounces.