What do bearded dragons do if scared?

If their hatchlings or juveniles, their strategy is to run like HECK. If they are adults, they will flatten out their bodies, lift their head and neck up s few inches with their front toes, gape their mouth, hiss, puff out their little "beard" and the males will turn them jet black. If you have a cat and a beardie, then this might happen when the cat is at the edge of the glass. This will send the beardie OVER THE EDGE!!!