At the end of the episode, Brad, Randy and Mark are sitting on the couch when Jill hands them each a mug of hot chocolate. Mark keeps a magazine in front of his face the whole time. During the end credits when they play some bloopers and additional gags, you can see that the boy sitting on the couch is not Taran Noah Smith (Mark) but a different actor.
This episode has a scene in the hospital emergency room where a male nurse, named Buzz, gives Tim a mug of coffee "with 5 sugars." He then makes the comment, "any more sugar and everyone will be calling you, Buzz." A little less than 2 years later Toy Story is released and Tim Allen is indeed called, Buzz.