sleep inducing

I like to compare notes with people about many things.It is interesting.But sometimes killjoys appear! The situation is that whatever subjects were started, this kind of people always try to call away other talkers' main attention from the subjects and want they turn the attention to themselves. They use much louder voice ,and keep interruptting other people's sentence. You can always hear these words "I feel ", "I consider", "I am" I were"... What is worse, they keep boasting of their excellence .It is so boring and I was almost sleepy. The best method I can think is "run "and "dodge"!