While Beth is typing at her computer the screen does not show any kind of word processing program but is on the initial command page.
Bill's grand piano is too large for it to ever get on the elevator and through the office door.
In the opening tag scene, there was no way Matthew's jump could be far enough to go over Beth's desk which is about ten meters away from the office's entrance. This is however, an 'eye-popping' wacky comedy cliche.