person A: Last week_comma_ my brother landed a 900 on his skateboard like Tony Hawk at a skating competition.
person B: Oh wow_comma_ that sounds like it might be cool but I don't know what that looks like_comma_ what is the 900?
person A: It's when you turn a skateboard 900 degrees while spinning in the air. It's very hard to do_comma_ so you can imagine the look on my face when I saw my brother do it.
person B: Yea_comma_ how old is your brother?