While at the excavation site for The College of Winterhold, I had given Lidya a staff of flames. during a fight with two Draugr, she whipped it out and started spraying it at one of them. A quick fire rune I cast took care of the job, and I swiftly moved on... until I heard the familiar sound of a jet of flame behind me. Lidya was trapped in some sort of time-loop, forever toasting the wall she was facing. I couldn't talk to her since she was in combat mode, and even when the charge ran out she still stared fiercely at the wall. I had to reload the autosave at the beginning of the place to save Lidya.