If a teacher's monologue counts, certainly!

One time, but someone was kind enough to wake me up so I could finish it.

Yes. During all of them. Sitting still and trying to pay attention to someone talking means sleepy time for me.

Yes, and i was speaking :(

Like mid talking or listening? I've done both, but I want to know the question.

(It's easy to fall asleep when listening, but you need to be a special kind of tired to fall asleep mid sentence, or even better, dream-speak a few nonsense sentences)