I call the nurse. Sure, she's mean but it will give me satisfaction to Imperio her. Yeah, I'm kind of a baadass, plus I hate hospitals. She disconnects all the various monitors by unsnapping the white foam thingies off my chest and takes out my IV without hurting me. Then, I send her to stealthily steal clothes from another hospital patient, which are usually kept in lockers or in cabinets in each room. They're big and baggy, but they will do for now.
Once I have clothes I head to the bathroom and transfigure the biohazard bin into a cauldron and carefully accio all the needles and stuff in there into ingredients for a polyjuice potion using my own hair. I brew it, force the nurse to drink it, and then make her get dressed in my gown. She lays in the bed, and I escape while everyone thinks I'm still in the hospital.
That's what she gets for pissing me off.

Kat/Puff