Why would this man secretly take my picture?

I recently had a situation where I was sitting in a meeting and I'm 75% sure this man took pictures of me during that meeting.

My suspicions were mainly aroused because when i turned around he was standing behind me and he raised his iphone at an odd angle every time he checked so it was facing dead center on me even though we were sat at angles and when he saw me he left.

I have no idea how to explain this behaviour or what his motivations would be to take pictures of me in that manner, but it has weirded me out slightly. Why would he want a photo of me, especially since he was standing behind me to take the photo?

Its depend on him.

Its completely normal to be creeped out… He is probably just a confused person.although in al lot of places it is illegal to take photos of people without their permision… I don't know where you live though so i don't know but don't worry too much about it. Its very unlikely it will affect you too much