person A: My grandpa always said he was a rockstar back in his day_comma_ but I never believed him. 
person B: Why don't you believe him? He made have been quite the big name back in his day.
person A: I don't know if he was famous_comma_ but the other day_comma_ he got on stage_comma_ bit the head off of a bat_comma_ then belted the words to Crazy Train. It was unbelievable!
person B: Wow_comma_ that sounds amazing. I wish I could have seen that!