Chest pain...Why are you posting on this forum and not on the way to the E.R.
DUH!
Just because there is no family history of heart disease it doesnt mean that he cant get it. Sounds like he needs to book a doctors appt for a check up as soon as possible, to make sure he hasnt got a problem. It might be nothing to worry about, but youll feel better if you know.
If you are really worried, its justifiable to go to an emergency department - e.g if the pain radiates to his jaw or down an arm, or if he gets short of breath. I am not a doctor, this is only my opinion, not medical advice.