The visceral nature of sports sometimes overtakes us and our body does something out of natural reaction. A buzzer beater could lift us out of our seats or off our feet. In this case, Victor Oladipo's vicious dunk might force the air out of your lungs in a reactionary "OOOOOOOOOOOOOOHHHHHHHHHHHH"
So OOOOOOOOOOOHHHHHHHHHHH away, folks. It's just natural. Like farts, but way cooler.