BTP Yellow 17" Balloon

I have an uninflated 17 inch yellow crystal balloon, and I'm surrounded by pretty purple and white balloons. I'm going to inflate this yellow balloon by mouth until it pops! The balloon inflates very quickly. How much air do you think this balloon can handle before it bursts? The neck is stretching. I get excited, but a little nervous. It's so tight! It's going to blow. I keep inflating the balloon. How is this balloon still here!?!