Just a thought prompted by a short flight I made just before christmas.....
The flight time was just under an hour, she was travelling alone, and had struck up a conversation with the person sitting in the next seat. They had quite a bit in common so the time past very quickly, and before they knew it the seat belt sign came on for landing, alone with the usual announcement that the toilets were now out of service (i.e. next oppotunity to go would be in aiport arrivals).
This suddenly reminded her of all that coffee she had been drinking whilst waiting to board the plane, and although she expected to be able to hold it until getting there, it dawned on her that it could be a challenge. She carried on chatting, but started to squirm during the descent, and fairly soon was getting really desperate but had no choice but to hope for the best! Will she make it......
Not sure if this would work as a mock up situation (or maybe its been done), but I love the concept!
Merry christmas and a happy new year to one and all!!
Richard