Down at the casino floor, Wilson is creating an alibi. He slides up to a woman at a craps table and loudly and memorably introduces himself. The woman introduces herself as a "Mrs." "I'm from Princeton!" Wilson tells the world. "My husband and I and our three children are from Philadelphia," Mrs. Schaeffer says. Wilson rolls his eyes and says something that's sure to leave a lasting impression just in case the police ask: "So, uh...do you like to swing?" Mrs. Schaeffer laughs and says no. Wilson implements the second part of his alibi plan and asks his friend "House," some random guy about House's height and build holding a cane, which room they're in just in case Mrs. Schaeffer changes her mind. With that, he leaves the casino, paying off the fake House and taking the cane back on his way out.
Wilson finds House sitting in the hallway outside their hotel room and says he got him an alibi. House didn't even ask for one. Alibi or no, Shitter's going to have a field day with this if he finds out. With that, they sit in the hall. We hear a thump as Dan kicks the chair out from under him and begins the process of his slow horrible death begins. Damn. I guess the somber and powerful effect of this scene would be ruined if Mrs. Schaeffer and her husband were to show up and say they changed their minds after all.
Back at PPTH, Dan and Kyle are wheeled into surgery. I'm not going to question how they got Dan back to PPTH so quickly and how his heart could still be viable. Cuddy finds House and says they found an open bottle of aspirin next to Dan's body. How lucky that Dan had a headache just before he killed himself and took an aspirin that would also reduce trauma to the heart and keep it viable for longer. She gives House an "I don't even know what to do here" look, shakes her head, and walks away. Some people thought that Dan committed suicide with the pills, but I'm pretty sure he didn't since he seemed pretty set on whatever would keep his heart viable for the longest amount of time, which was strangulation. He took an aspirin beforehand because it would preserve the heart. If you look carefully, you can see that red mark around Dan's neck when he's wheeled past the camera. So it seems pretty certain that that's what happened.