I've been getting into tricks and watching some videos. I know the principle of o's and can somewhat do them, but I don't understand jellies at all. Any tips? Also how do people get tons of o's off one drag? Is it a lung inhale or just held in your mouth as if you were doing a single o. Thanks for the help! 
Puddin
	
		
			
		
		
	
			
			Puddin
 
				
		 
 
		 
 
		 
 
		 
			 
 
		 
 
		 
 
		