Some people build trucks. Ingmar Spijkhoven (2LegoOrNot2Lego) builds mechanical masterpieces that don’t just work, the look great doing so as well.
Some of the functions: the truck is driveable, has suspension on all axles, liftable second axle, fully functional fifth wheel, a winch, and the trailer can split in two so vehicles can drive on and off.
Oh yeah. It’s all remotely controlled.