I can understand where this is coming from tbf, I used to be the same. I was lucky though, with life and experience and such, the social interaction side became more natural and fluent, and getting interrupted by whatever reason doesn't produce the same response anymore.

Mind you, what I do that requires focus isn't the most exciting or difficult thing anymore either, so that might also be a factor.

Third, I work in much less dickish environment. Nobody will come up at you and start yelling, that's just unprofessional. With that in mind, I don't know what I'd do if that were to happen. Depends on the situation / reason / person / etc.