In the scene where House is eating lunch in the coma guys room with Wilson, after House says "Bros before hos, man," the camera angle shows you the back of Wilson's head and clearly he is scratching it. But when the camera quickly cuts to the front of Wilson, both of his hands are at his sides.
Mark can't feel his legs and a nurse comes to see him, but the same nurse is seen at the same time in the lobby when House and Stacy come to see Mark, going in an opposite direction but when they enter Mark's room the same nurse is there.
When Stacy comes into the lab to talk with Cameron, she's holding a cup of coffee in an awkward position as if it's nearly full, but it's clearly empty from various camera angles.
During the differential diagnosis of the volleyball player, House has "tendonitis" written on the white board. While this is a commonly used and technically correct spelling, inside the medical profession the word is spelled "tendinitis."
When House is watching baseball in the clinic, the sound of the ball being hit is that of a metal bat even though they use wooden bats in the major leagues
Annette mentions Harvey was seen by an acupuncturist who diagnosed Liver Qi stagnation and sent Harvey to a Shen balancer. No practitioner in this area would do such thing as 1) Liver Qi stagnation isn't treated by balancing the Spiritual Aspect Shen and 2) any competent acupuncturist is capable of dealing with the situation and should easily move the Liver Qi to resolve such stagnation.
A stunt double is obviously used in the shot where the girl diver is underwater: not only is her face different, but her hair is loose and much shorter.
Trivia: This episode introduces House's new cane, called a "Derby Walnut."
For some reason, during the ultra-sound scan of the brain they super-impose the sound of a fetal heartbeat.
Toward the end of the episode, House is sitting alone in the meeting room, and we see what's written on the whiteboard, including the phrase "intercranial bleeding". "Inter" means between, so this would mean bleeding between two crania. The correct term would be "intracranial bleeding", or bleeding within the cranium.
Foreman explains to the senator that Toxoplasmosis is caused by a fungus, however this disease is caused by a protozoan called Toxoplasma gondii.
When House tests the senator for HIV, he orders an ELISA test, which confirms an infection by detecting antibodies to the virus. Nowadays, however, it is hospital policy to use tests that detect viral cells as well as antibodies rather than ELISA because they are quicker and more reliable. Secondly, the PCR test usually isn't used as a confirmatory test, but as a rapid test for medical staff. Besides, doctors are legally bound to run the confirmatory test before telling the patient about the infection.
Trivia: The name of the hospital canteen is revealed as "The Grill."
House deduces that Lucille has been cheating on her husband from the color of her children's eyes. Both Lucille and her husband have brown eyes while most of their children have blue. Brown eyes are a dominant trait, but we know that Lucille must have the gene for both brown and blue eyes or else none her children could have blue eyes. Theoretically her husband could have the same mix of genes and then every child would have 25% chance of having blue eyes, which--unlikely as it is--could account for the majority of children with blue eyes.
House wrote "TEMPORARY PSYCHOSIS" on his dry erase board and put his marker down. Then, the camera pans the room and Chase gives his theory as to why the girl did that. We then see the "TEMPORARY PSYCHOSIS" circled on the board (but House put his marker down earlier). They argue for a few minutes with "TEMPORARY PSYCHOSIS" circled. House tells Cameron & Chase to give her medicine. We see the board again and "TEMPORARY PSYCHOSIS" is not circled.
During his last session of clinic duty, House places the cat, fire truck, fire fighter and police man on the table. Why would all these toys still be in the clinic? Wouldn't the teenager have taken then home with him?
During clinic duty, House tells the teenager that "he better clean it (the toy) before he allows his brother to play with it again." But in the next shot where he's placing it on the table, it's clean.
At the end of the episode when House walks into the conference room where his team is, he stands in front of the whiteboard which is covered in writing from the previous patient. The camera then changes to Wilson in the hallway who's looking inside and then back to House who has made no movement. House then begins to speak to his team and all the writing on the whiteboard has been erased.
When the older Dr. Chase concludes that it must be an autoimmune disease they give Gabe a new medication to treat it. There is no reason for them to do this, since he is already on methotrexate which is used to treat autoimmune diseases.
When talking to Wilson about Chase House says that he is 26 years old and that his parents have been divorced for 15 years. Later when Chase is talking with his father, he says that his father left him and his mom when he was 15 years old. So if his father left 15 years ago this make Chase 30 years old now and not 26.