But what's the longest lights-out line-following exit you had to do in a class?

I did one in Full Cave that started from about 38 minutes of penetration, and was 48 minutes long (got my butt chewed for being slow, and learned a lesson about pushing the person in front). In mid-exit, my "buddy" (instructor) reached back and took the reg out of my mouth, which was fine.

Just wondered if that was typical. It was a long time to be in the dark, although nobody is really ever in the dark with an X1