Wanda is terrifying if helpful. I don't think I know a Magsy... Anyway, here goes.

[He vanishes in his usual puff of sulfurous smoke, but instead of appearing on the other side of the door, he reappears on the ceiling a few feet to the left of where he'd planned, only to plummet to the ground with an indignant squawk.]

Verdammt. Haven't done that since I was twelve. What-- Oops.

[He tries to pop back into the cell to avoid the sudden onslaught of guards. This time he pops up on the wall and tumbles to the ground yet again.]

Not so good.