Seems I've thrown the cat among the pigeons.
A popular TV show (Mythbusters) recently tested an infatable bra to see if it would burst. It took depressurisation to altitiudes in excess of 47000Ft (altimeter they were using didnt go any higher) to cause an appreciable increase in size, but didnt burst.
That was a bra. What was the initial psi of the 'inflatable' bra? Was it more or less than a football? Suppose you have a pressurisation problem - maybe that ball might let go at way less than 47,000 ft diff - just to compound your problems!
so there's only an extra 4-5 odd psi on a football that's designed to take 28psi (absolute).
Are all inflatable bra's pressure tested to 47,000'? Are all footballs? Who says the quality control is uniform?
On arrival I went to get it and was quite shocked to find it a tattered mess!..... it blew up for sure.
Use the pin on your name badge to deflate it a bit. Problem solved.
Damaging passengers property? Surely thats the baggage handlers job!