Mine is callipers snapping or crutches breaking in the middle of nowhere. It usually awakens some type of mental torture not knowing what to do next.
Well, there are variations of this. Having a flat wheelchair wheel and no one is around to help and a friend/guide pulling out of a plan the last minute.
My most dreaded one is when travelling and the driver decides to charge me more after the journey.
For me, it would be definitely falling. I've been on crutches 15 years now, and I've gotten quiet used to walking fast with them. With my love of walking, for exercise and to get anywhere, I'm pretty confident walking around. But with speed, there's also the worry of falling. Cause when I fall, I'll get many awkward stares and lots of pity. Even though some people come to my aid, they'll be all caring and even when I say I'm okay they think I'm injured. And they'll watch me till I'm not in sight.
Encountering a fleet of stairs, having a stomach upset. These will dim my light almost instantly.
When we are having a meltdown as Grace can cry for hours 😪