As I took the laundry to the basement, Stella darted out ahead of me. I had my hands full with laundry and supplies, so I figured I would catch her when I got back. I found her on two, and she ran from me to the first floor landing. I was only wearing my socks and they're too slippery for the stairs so I went back to the apartment to put on my shoes and Annabelle slipped past me into the hall. I put on my shoes, caught Annabelle, put her back in the apartment, and went in search of Stella. I found her on one, caught her, and brought her up, ready to brain two cats.