There's a strange teacher next to me.

I heard the teacher next to me giggling. I figured he was looking at some website that had a funny comic on it or something. I did a probably-not-so-subtle fake stretch so I could see what he was looking at and it was some excel spread sheet file. He'd say a few words to himself and then giggle like a child. Then type in some numbers. I'm all for enjoying your work... just... I dunno... I feel really uncomfortable right now.