Hi! --- fantastic question, so far, mostly due to the gentle nature of General Aviation flights and my sellotape skills, I haven't had to deal with this.

I did worry at one point, but it's surprisingly sturdy.

If it does fall --- no worries! I have my original (kneeboard) copy to go off

Thanks for the question!

I’d rather reach down in the plane and pick something off the floor than do the same in my car. Especially if the plane has a half decent autopilot.