I hate when I am talking to someone and someone that person knows walks by and out of nowhere I get introduced to that new person. It's so random.

I never know what to say because I am not expecting to get introduced to someone new who I don't know. It's borderline rude and it catches me off-guard.

I don't think that is social anxiety or anything like that. It's literally disrespectful. I guess that level of disrespect is what annoys me the most... and it happens frequently.