If you solo othalo barracks, and as soon as you enter the instance (before exiting the stair way, if you talk to Gaoler Brin till he attacks you he turns red, you run down to attack him and he resets to friendly green outline status, while he's hitting you. Both exits blocked, no way to fight back ... sucks.
I thought the only exit is suicide express. But I also simply tried hitting the logout icon (bottom left) and that worked to get me out of the problem.