You definitely need to get him in to see the doctor; take him to the ER if you need to. This is not normal at all and if he truely stops breathing, he may not start it back up again.
He does need to be seen by a doctor. It could also be heart related. I was the same way as a baby. Doctors kept sending me for EEGs to test my brain waves. I have no idea what the results were since I was too young to be told anything. It wasn't till I was much older that a doctor said it wasn't epilepsy but it was my heart. Good news is my heart rhythm may be weird but I'm turning 60 next week. So at least it wasn't anything fatal. Please do take him in.
It sounds like it could have been a seizure. He needs to be seen by a doctor, right away.