Billy Merchant says someone took the handicapped parking spot, and the camera pans to Michael making an uncomfortable face, implying that Michael was the one who took the handicapped parking spot. However, it is indicated that Dwight picked up Michael from his house to bring him to the office. Also, Michael later on says he is unable to drive, and that Jim has to drive.
When Jim, Dwight, and Michael are loading into Meredith's minivan to take Dwight to the hospital, Michael wants to know why Meredith drives a minivan. Jim says, "She has a kid," and Michael follows with "She has one kid and no husband and she's not going to get one driving this thing." From Episode #1.4, "The Alliance", we already know that Meredith has "two kids" according to Dwight's brief biography on Meredith as Michael tries to write something witty in her birthday card.
In the opening scene, the wallpaper on Pam's computer changes from the standard Windows XP background to a Dunder-Mifflin background, and then back again.
During the scene in which Dwight comforts Michael's burned foot with a hand-held electric fan, Michael's crutches are leaning against the wall behind Pam. At first, they are overlapped. In the next shot, they are apart. In the following shot, they are overlapped, once again.
Before Dwight goes for his CT scan, Michael is told to remove everything metal and electronic. However, when Dwight is having his scan, he has a watch on.
The nurse advises that all metal needs to be removed before Dwight's CT scan and won't allow Michael in the CT room until he loses all metal on his person. This wouldn't be necessary for a CT, which uses X-Rays and is not magnetic. The only metal that would hinder the procedure is metal that would show in the actual image (for instance, earrings before a head scan).
However, the actual procedure done on Dwight is an MRI, which *would* react with metal.