Stupidity: Robin uses the high pressure water from the pump to neutralize the bear next to Batman (which is like 10 meters away from him and still the water jet is so strong that it pushes the 1000 pounds bear away and flips it on its back,), but does not use it to push away the other bear that is literally breathing on his face centimeters away from him. He has all the space and time to do that (especially after Batman's intervention). (00:50:30)
Stupidity: When the two Russians are walking past the security guard after killing Gregor, they are just allowed out without being detained because one of them shows a Chilean passport. The French gendarmes are not that incompetent. They would detain the men until everything is (or is not) cleared up. (01:49:05)