I don't think the fan was able to get the picture in time. Maybe that's why he tried again until Rihanna stopped.
But if not, that fan is an ungrateful bitch. One pic is enough especially when out of all fans, she chose you. Did you see the way he bitched about it to his friends at the end?
Disgusting stalker trash should have got his picture, how much time did he want? I love to drag Rih as MUCH as the next Gaga fan, but she really didn't do much wrong here. If she's on a tight schedule, he was lucky she even stopped at all.