Zonah sets out to test an "anti-burst" exercise ball. What happens when you just keep blowing, or pumping? She begins by inserting a hollow plastic tip as far as she can into the inflation port, and begins blowing. To her surprise, her pressure jumps up to around 2psi with every breath, and her cheeks expand to nearly full size with every puff, but the pressure in the ball remains zero until it begins to tighten at around the ten minute mark. She continues to blow for another twelve minutes, until her face just can't take any more. She then switches over to the high-pressure foot pumps, whi...

Zonah sets out to test an "anti-burst" exercise ball. What happens when you just keep blowing, or pumping? She begins by inserting a hollow plastic tip as far as she can into the inflation port, and begins blowing. To her surprise, her pressure jumps up to around 2psi with every breath, and her cheeks expand to nearly full size with every puff, but the pressure in the ball remains zero until it begins to tighten at around the ten minute mark. She continues to blow for another twelve minutes, until her face just can't take any more. She then switches over to the high-pressure foot pumps, which are very slow. After about fifteen minutes of that, she decides to unleash the air compressor. After nearly an hour (compressed with video editing), she finally gets the explosion she is looking for - at around 4.6psi! Examination of the wreckage shows why she had such difficulty with the initial inflation - a rubbery flap over the end of the inflation port obstructed her every breath, while the lack of pressure in the ball served to disable the check valve. So while she now feels quite safe about her ball not rapidly deflating in normal use, she does know that "anti-burst" does not mean "burst-proof."