Continuity: At the start of the film, when we first see Bertha she is being pushed around by a rehab, and she eventually falls to the ground. She then places a small bomb on a crane she lands beside, and the bomb is pointing to the left. When she gets up and moves away, we go back to the bomb at it is now pointing to the right. Whats also interesting to note is the fact that the rehab doesn't notice Bertha take the bomb out or place it on the crane. Surely if you're standing right behind someone who is on the ground, and you are watching their every move, surely them taking an electronic device out and placing it on an object almost infront of them would draw your attention?