My daughter does this & my first did it as well. It’s like they get super excited lol. I wouldn’t worry unless you think it’s to the point where he could be in distress. Otherwise, they’re just learning how to do new things
You might need to take him to his pediatrician to see what y’all can do going forward because it might be that rare condition where they hold their breath and it can be a very scary sighting to see
My baby is doing this now. Scared the crap out of me. The pediatrician says she’s just finding her voice