This could be epilepsy. It depends how many times he has been doing each night. e.g.In frontal lobe epilepsy
, you could have multiple episodes in a night while in temporal lobe epilepsy
, its usually a single episode, but more prolong lasting for up to 5-8 minutes.
You should get an EEG done at your nearest centre, make sure its a neurology doctor who reports it.
best wishDr R K Jain