Swamped

It occurs to you that it's strangely quiet.

At the speed the desert-horse was moving, it should be close to the sandstorm by now. You ought to be hearing the sand striking the wagon, but you don't.

Did the creature veer away? You decide to take a look. You put back the book, and head back to the driver's seat.

And discover that the desert-horse is galloping through the air.

The desert sands are down below. You think they're close enough that you might be able to survive the fall now, but the creature is starting to ascend. You definitely won't have a choice if you hesitate.

So, do you stay here, or risk jumping off?