If it exists, Tony Stark was able to build it in a cave, with a box of scraps. (This is a common inside refrence to a famous line in teh movie Iron Man. It's sometimes used on 4chan)
"That's a nice looking Krupp Coal Excavator. Who would have the patience to build something like that?"
"Rule 64 states: TONY STARK WAS ABLE TO BUILD THIS IN A CAVE. WITH A BOX OF SCRAPS."