My dentist and my chiropractor would have liked that. I tried different speeds, from slow to as fast as I dared. The sand unstuck thing does look cool. I'm going to go out on my limb of ignorance and guess that it works great on smooth obstacles and less well on steps or loose rock. I'll be quizzing the folks at RA about this in an attempt to become less ignorant.
Please share any inside info from the RA guys. We can all benefit from expert insight.