This happened during the early months of WFH in the covid pandemic. I had a paired programming video interview and my interviewer had some strange behavior. IDK if he had a weird tick, but his head kept dropping to the side like he was falling asleep and he’d jerk back up again. His eyes weren’t drooping though. It kept happening throughout the interview and I was afraid he’d fall out of his chair. I wondered if he was crashing from an all nighter or his body was shutting down in some way. It was jarring enough that I wondered if I should ask the recruiter to check on my interviewer.