If that's all because of that death stare McDreamy gave her, I'm going to need a bedpan over here. Izzie croons that she's proud of Meredith. At that moment the bathroom door bangs open and Callie stands in the doorway. We can only see her slightly blurry form through the mirror, but she looks like she's grinning a bit creepily. I can't figure out what's up with this chick, and it's only about to get weirder. The camera zooms up to Callie's face, which looks like she stepped into some really bad lighting that both Meredith and Izzie managed to avoid. Seriously, her skin looks gray. Callie's smile has dropped and she's frowning in confusion as she mutters, "Morning." Instead of turning around and waiting for the two girls to leave, Callie shambles in, topless, pulls down her red lace panties, and appears to do her business. Meredith and Izzie give each other silently amused looks. We get another really unattractive close-up of Callie's face as she hunches over the toilet. She then licks her finger, which is just so "huh?", and grabs a huge length of toilet paper. A flush and a pull-up and Callie galumphs back out. Dude, she didn't even wash her hands! And she's a surgeon! Izzie snorts and Meredith can't believe what just happened. "I'm having a seizure!" Izzie says through her Crest Whitestrip, "I'm clearly mid-seizure, I'm seizing." Meredith keeps saying, "Oh, my god," and gesturing with her toothbrush. "She didn't even wash her hands!" Izzie realizes. "Sometimes we even think we can fix the damage," Meredith voice-overs as we shoot over to the hospital where Izzie is giving George a bit of a ream-out for his weird, braless, unsanitary girlfriend who doesn't mind peeing in front of people she doesn't really know. George reminds Izzie that she admitted to blocking the sink, and thinks she's exaggerating. "She peed! Naked peeing! Ask Meredith," Izzie announces, then remembers that he's not speaking to Meredith. To Cristina's intense interest, Izzie goes on a tear about how Callie crossed the line. From the sidelines, Alexhole snorts, noting how they're still pretending Izzie's not seeing Magical Heart Patient Denny. Izzie glares at him. "People, what's with all the evil misery?" Cristina wonders, throwing her one arm around Alexhole's shoulder and the other around Izzie's. "Live and let live!" Before anyone can ask who scrubbed in on Cristina's personality transplant, George touches her face and diagnoses, "You're cheerful." They all look scared. Turns out, Cristina helped with a four-hour esophageal hernia the previous night, then she got laid, and now three ambulances are on their way filled with "bloody, broken car crash victims, all who need to be cut open," and she can't stop dancing about it. Seriously, Cristina actually does a bizarre Happy Dance that makes me wonder if she was a cheerleader in high school. McDreamy arrives on the scene acting very McCrabby as he asks Meredith coarsely, "How's my dog?" Meredith says that McVet is running tests, and corrects him that it's their dog. "What?" McDreamy snaps. "Our dog," Meredith says, prancing a little. Oh, don't prance. Don't prance. "You said 'my dog,' he's our dog," Meredith says, smiling. "Yeah, whatever," McDreamy says, and when she asks what's wrong, he self-righteously tells her, "Now's not the time," as ambulances scream up.