[ the prison is an interesting place with a great deal of interesting species castiel had never considered to exist. demons that were relatively good, girls who could lift mack trucks, people back from the dead; and now, a girl climbing into thin air.
of course, being an angel means that he's not so much shocked as curious. when he appears before her in mid-air, he looks at her with a scrutinization that's not unkind, but obviously cursory. ]
You're not flying... [ and it's not teleportation. how you do that, kitty? ]