I blow2pop a 16 inch yellow crystal balloon while sitting and bouncing on a big 24 inch one. The balloon gets huge with a nice long neck, but it is very stubborn when it comes to popping! I keep blowing and blowing and blowing unsure if the balloon is ever going to burst. It's such an adrenaline rush when it finally pops into lots of tiny shreds. I even end up with tiny pieces in my hair.