While Jess is arguing about the processing fee with the banker, the paper bag with all of Nick's money in it is sitting on the desk. After he kisses her and the shot returns to the banker, the bag has disappeared.
When the bike messenger is hit by the car, the driver stops and gets out. His shoe is shown next to him when Schmidt runs to the biker's side, but in the next shot the car and the man are nowhere to be seen.