I would look at him and make eye contact briefly and he would quickly raise his eyebrows a little and drop his jaw and then quickly break eye contact.
I noticed both times he did that he was a little nervous when we talked. He had a ton of trouble looking at me and every time I smiled or laughed he looked at me quickly and looked away nearly instantly. I could tell he was nervous from the way he was talking. I also got the idea he felt uncomfortable.
Guys, have you ever dropped your jaw out of being nervous?