...I managed to capture this! When I showed my brother the photo on my tiny camera preview screen he almost dooked his drawers. But upon closer examination what we thought might be some evil spectre just turned out to be...
We back to my place to discover that we'd been locked out! (One of my roommates had engaged the bolt and I hadn't brought the key for it). So I had to hoist Tinny up six feet in the air so she could shimmy into the window.