House wheels his morphine drip into Cuddy's office, and shame on her for not being by his bedside for those two days instead of Cameron! After all, shouldn't the hospital she runs be able to keep the crazy gun-wielding former patients at bay? And where is the gratitude for those two ass injections he gave her that were the only bright spots in last week's episode? Cuddy immediately knows that House is there to yell at her about his new roommate, and says that they have no other place to put the shooter, as PPTH is full of patients today (which is easy to do since the place only has, like, five patient rooms). Cuddy says that they have House's assailant handcuffed to the bed and sedated so he won't be able to harm House again. Because I'm sure the sight of the man who tried to kill you resting peacefully next to you isn't mentally harmful at all. I think Cuddy's hormone injections came with an extra dose of stupid.
House stops caring about his shooter when he realizes something else: his surgery was messed up somehow. He says this while tinkering with the only thing he kept himself connected to: his morphine drip. Cuddy tells him to stop upping his dosage, but House says that he isn't -- he's lowering it. And the effects can apparently be felt instantly, as while his belly and neck hurt a lot, his leg doesn't hurt at all. Cuddy is amazed and pleased, but House isn't. Surgery for gunshots shouldn't alleviate leg pain like this. Something must have gone wrong. "Enjoy the mistake," Cuddy says. House won't, because while the leg pain eraser is a good thing, there are sure to be other side effects that might not be so pleasant for anyone except we, the viewers.
House is forced back to the ICU, where he stands over his shooter with a key that he inserts into what looks like the guy's morphine pump so he can lower the dosage and wake the guy with pain. He can do this because there's no one watching or guarding the attempted murderer. "Why did you try to kill me?" House asks the guy when he wakes up. Shooter says that he didn't -- he strategically shot House in non-lethal places so that House would live and suffer. The only person suffering right now is the shooter, as House removes his morphine connection entirely, and the guy starts moaning in pain and sounding like a total wimp about it, too.