Stupidity: In the scene where Lewis and Clark nearly hit the Event Horizon, One of the crew is calling out the closing distance and another confirms this information. Regardless of clouds obscuring their view they were aware of their proximity and the fact that they were speeding towards it and forced to attempt an abrupt stop makes no sense.
Stupidity: After pushing the button for the outer door in the airlock, Justin was brought out of his trance. The door was on a delay, so why didn't he just go to the console and abort the door's opening?