Is it normal for someone to do this?
When two people are talking about something and a third person lets call them C comes in. The people talking will be A and B. Person B will be explaining something to A and C will jump in and say something not relevant to what they are talking about. Person B cant finish their thoughts and person C ends up getting upset with B when they cant answer their questions properly while struggling trying to continue telling point to A while answering C pointless questions. Which usually ends in C getting angry when they are not really even in the conversation or contributing. I mean its rude to tell person C to go fuck off but at the same time you cant have a discussion without them ruining the flow.