The poster also saw them in action: "The crab walk and launch were really cool to see in person."
Someone that commented on that Facebook post also spotted some and had a chat with the engineers!
"These trucks are out and about being tested by some of the engineers. I was fortunate enough to get to chat with a few of them today about the vehicles and all the fun things they can do. What a truly great group of people and the trucks are pretty cool too. I’m even more excited to get our edition one after meeting these guys and gals."