During the kitchen conversation about using the name Ross for one of Phoebe's babies, a very large piece of white lint appears in the center of the gray section of Ross' shirt; then disappears and reappears several times.
Ross refers to the comic book "The Incredible Hulk #72", but
no such comic existed at this time. "The Incredible Hulk" was canceled at #6; the Hulk then appeared as a feature in "Tales to Astonish" until he took over the title in 1968 and it was renamed "The Incredible Hulk" with #102. There were no issues numbered #7-101 until the title began renumbering with #1 in 1999, a year after this episode aired.