I was at a large venue close to the bar talking to a single girl. About 5 minutes into it someone from behind me picks me up from my armpits spins me around to face 180 from where I was facing and sets me down. I look behind me and it's a muscular guy (I have muscles too but this guy was at another level) and was already talking to the girl I was talking to within seconds. I was unsure if it was a friend, boyfriend, or just a random dude because she was already laughing with him.

I wasn't sure how to handle this because I know being reactive to this guy would only lower my social value, getting in a fight is a lose-lose regardless if I could take him, and going back to talk to the girl would display neediness. The situation was very bizarre and I was really in such shock at what had just happened my mind just went blank. Any thoughts?