Isn't part of the issue that hypermobility can be just part of who you are for some people and a hideously debilitating disability for others?
I see what zzzz is saying about epilepsy, and of course she is absolutely right about attitude being crucial. At the same time, there is something about severe chronic pain (which is what some people get with hypermobility) that is extremely wearing.
Not least because if people see others coping cheerfully with the same condition, they assume you are just putting it on. If little X can bend even further than your child and skips around the playground happily, then surely your child has no right to claim she is in so much pain she cannot walk? And if your child seems to be in more difficulty than her condition warrants, then isn't that likely to be due to an attitude instilled by her mother...
I am happy to say that dd has now got to the stage where she can laugh about her body not functioning very well. She is tough and resilient and does not give up. We joke about all sorts of things. But while she was still at school, I had to be wary about what I said to whom. There were plenty of people ready to pounce on any suggestion that her disability wasn't real or didn't impact on her life.
It's like when you've got a child with ASD: people assume they know exactly what they are going to be like, because they have seen Rainman, or known a child with moderate Aspergers.
Light-hearted is fine. But realistic is also good.