Other mistake: In analogy to David's mishap with the champagne glasses old Mr. Larrabee crushes an olive jar when he sits down. However, in contrast to David he puts the jar into the front pocket of his pants, and olive jars don't break even if you sit on them (remember what he did to one when he tried to get the last olive out.).
Other mistake: On pursuit of one of his conquering strategies David comes into the tennis hall where his present belle Gretchen is waiting. He looks around and calls out for her, although the full moon is shining through the windows and she is standing in the middle of the court, quite visible in her white dress.