masturbated to the thought of someone who's not my boyfriend

I was just casually masturbating (I live 5 hours away from my boyfriend), watching some random, nondescript porn video. As I began to climax I stared thinking of and saying the same of, a dude who is not my boyfriend. I'm not sure if this is weird or not. I don't even know this person, I saw him at a concert once (he's the drummer of my favourite band) and he winked at me, presumably because I was standing in the front row the whole night and was wearing only denim shorts and a see through black bra. He's pretty sexy, but I'm in love with my boyfriend and never spend any time fantasising about this person, only listening to his music. This has never happened to me before so I don't know what's going on. Perhaps just one of those random occurrences and crazy thoughts that happen when you orgasm ahah.