You see the holes in the wheels? As it tracks along the surface it leaves a trails of dots that spells out "JPL" in Morse code...
Engineers are cool...
Cool. I can see that in the closest wheel, now that you mentioned it.
My wife works for a company that provided an instrument that was a critical piece in getting the Rover to land without careening into the surface of Mars and smashing into a million pieces. Once it landed safely there was a huge sigh of relief. Not too many people can make the claim that something they handled is now sitting on Mars.