Continuity mistake: Though she and Mark have both been calling Putzi the dachshund (who is visibly female) a "she" and a "good girl" throughout the episode, April has an odd memory lapse later and refers to the dog as "he." (00:29:30)
Revealing mistake: Mark's stunt man is a little too obvious in the final fight scene. Mark suddenly gains 20 pounds and a whole new set of muscles that he didn't have before. (00:44:35)