And House is back in his hospital bed, staring at Shooter McGavin, who says that House was yelling at him and calling him Wilson. Also, House's bathroom hallucination made it into real life, since he has wet his bed. Man, there is nothing more embarrassing than wetting your bed right in front of the guy who tried to kill you. House mutters a "damn it" as the Cottages stroll in, ever the masters of bad timing. House pulls his blanket up to hopefully cover the wet spot that's forming underneath him as they report that Harpo was negative for testicular cancer. House tells them to do a cystoscopy that will prove that Harpo is human (i.e. show them if he has some kind of weird anatomical defect that is causing the kidneys and scrotum to be connected) while Foreman and Chase totally sneak quick glances at House's bed and presumably the wet spot they can see on it. Cameron is either clueless or doesn't want to ruin her crush fantasies with evidence of incontinence.
House and the Cottages walk down the stairs. Chase tells House that the test was negative; Harpo is free of anatomical defects in his urinary tract. That should be quite a comfort for the guy missing an eyeball and a ball-ball. Oh, and let's not forget his giant tongue. At this point, House realizes that he can actually walk up and down stairs without difficulty. He takes a moment to enjoy this, merrily skipping up and down the steps bathed in the glow from the sunlight coming in through the blinds, and he tells them to biopsy Harpo's prostate lymph nodes. Cameron protests that this would involve cutting through Harpo's stomach, which they can't do because of Harpo's bleeding problem. Foreman argues that they don't know whether Harpo even has a bleeding problem. Then House stops running up and down the stairs to ask them all how he got there. The last thing he remembers is the end of the last scene. Oh, I love that! We viewers all assumed that editing transported us from House's bed to the staircase, cutting out the unimportant and unnecessary stuff in the middle, as TV shows and movies always do, and then suddenly it all gets turned on its head when we realize that we were actually experiencing it in real time. And now we, like House, can no longer trust what we see and hear. I love it when TV shows and movies fuck with the audience like that.