I ve tried to make a minifig buggy since the day i saw the Proudlove'stiny turbo buggy which was based on Raphy's one. Yesterday i notice the great compatibility between the Spear Guns and the Hand Truck and it was a couple of hours work to create it and a couple of hours plus to make the photo scene!
u can take a closer look on the Hummer
and by the way i ve never thought that a hand truck could be useful in any of my creations!
you can see instructions