Please avoid double posting, thanks!
I don't get interrupted too often, but that's because I don't communicate very much with others. When I do though, I typically seethe in a very quiet, passive aggressive way, wait for the person to finish what they're talking about, and force the topic back to what I was saying after commenting on what they interrupted me with. I HATE interruptions. They are a huge pet peeve.
This is in conversation, that is.
In the middle of doing a task I must focus on, I get interrupted all the time. It happens when you live in a small room with another person. I either get interrupted by my mom, who has the absolute most annoying voice and who I will lash out at with an angry: "WHAT?!" or by my fiance. I try not to get so angry at him, but I can't really help it sometimes. I don't like somebody forcibly yanking me out of my focus bubble with their words. When I am focusing on something, everything else becomes completely irrelevant, and I will not rest until it is finished. If something tries to prevent me from that goal, I will snap at it.
Overall, I'm really bad at interruptions. I see them as pointless distractions most of the time that disrupt me from my goal.