CTB tells House he wasn't really worried, because his plan didn't matter. His backup plan didn't matter. The only thing that mattered was the puzzle.
House tells the patient that he's dying because his thumb is shaky. He's got Lou Gehrig's disease! The patient seems to accept that. Then House says he's not symmetrical, and CTB pounces on a continuity error where House teleported to the other side of the room. House says he just skipped some boring stuff (man, I know the feeling!) but CTB thinks he's avoiding something. House returns to his story. He spots that the patient's veins aren't symmetrical, so he drags a machine over to his bed. I believe it's an ultrasound. The new thing is that the patient inhaled a small branch, which a non-junkie would have coughed up. And it caused an autoimmune problem.
Dingy room. CTB catches House smiling. She recommends he let Wilson die, grieve for a bit, then get back to having fun solving puzzles. He thinks it's a waste of time since everybody dies. She tells him to go home. House gets up and picks up his cane. He walks down the hallway to the exit. Unfortunately, the room on the other side of the exit door is on fire.
Wilson and Foreman in House's room. Wilson says that House would never leave Chinese food rotting in his living room. Foreman says the suitcases are still there. A call comes in on House's cell, reporting that House no-showed a hooker two nights ago. They check the outgoing calls. They include hooker, Chinese food, Wilson and Mystery Number!
House hobbles around, and the floor makes noises like it's close to collapse. Then it collapses! House falls about twenty feet to the lower floor, which cannot be good for his leg. He looks around with what looks like Epiphany Face.
Foreman and Wilson bust into Andre Braugher's office to tell him that House is missing. He doesn't want to tell them where he is, but they think he's a danger to himself. He admits that there are other ways to reach oblivion. Foreman and Wilson dismiss the idea of Vicodin overdose because that should be impossible by this point. But then they remember that House's last patient was a heroin addict. Andre Braugher figures they're done here. I've just looked it up, and Andre Braugher was playing Dr. Nolan. Anyway, Wilson says they need to get to the patient's home.
Now a woman on a chair is looking at House, asking him about God. I don't recognize her at all, but after some research, I can report that this is Stacy, who was House's girlfriend back in the first two seasons. House dismisses the idea that falling through the floor was a sign. He denies having even thought of that, although he admits that part of his brain is currently talking about it. Stacy says, "I lived with you for years, I know you believed in love."