The evil clown just stands there when Jonathan points the magic cannon at him and waits while he tells Jennifer to put the balls into it. The clown is backstage at a magic club and knows that the cannon is going to shoot the balls at him, yet stands there and waits to get hit.
The round window is back behind Jonathan's desk in his office, when there are no round windows shown from the exterior. The door to the right of his desk would open to the outside of the building.
Max's date complains about his deserting her "the other night", when it was just the previous night.