New bag?

Something funny happened when I walked into my lecture tonight.

I was late to my lecture as usual :-) I spotted a seat between a girl and a guy. I visibly recognized the girl to be my friend as I walked in, and the guy as my friend as well. I was thinking, great!, I can sit between two people that I know.

As I was trying to pull out the chair, the guy's bag was in the way. He tried to move it. It was a shiny leather bag. Then in my lowered voice, I said, "Hey nice bag. New eh??', because I never seen my friend bring that bag before.

Then I looked at his face . . . and I don't know who he is! He is not my friend!
When I walked in, I thought he was the friend that I know since he looks very similar from the back.

He looked suprised as well. His eyes were very big staring back at me.

... so embarrasing.