When someone is starting to tell you something from his or her life, some persons are immediately interrupting and starting to talk about the same topic, but from their own perspective instead. Example:
Person A: I just came back from Italy, I had a..
Person B: Oh Italy! I remember when I was there five years ago, bla bla bla..
Is there a word for that?
Best Answer
That's what I'd call hijacking the conversation:
(Definition and examples from Oxforddictionaries.com)
Sometimes, a person who hijacks the conversation could be termed an attention whore:
(Definition from Urbandictionary.com)