If the pressure of the air blast is strong enough it could penetrate the skin and enter the bloodstream. That's compressed air which was directed under his armpit (very delicate area of skin) for about a minute. If it was through his shirt and not under his shirt he may be fine.
I'd see a doctor if you have:
- low blood pressure
- irregular heartbeat
- extreme fatigue (tiredness) or lack of strength
- blurred vision
- disorientation
- a faint blue tone to the skin caused by a lack of oxygen in the blood
- irregular breathing
- a lack of oxygen to the body tissues
It's probably safer to stick a bicycle pump up your butt for fart sounds
or just eat a bean burrito.
