Thought you already loved Robert Downey Jr. as much as you possibly could? Well, buckle up buddy.

In partnership with The Collective Project, Tony Stark himself visited a young boy named Alex, who was born with a partially-formed right arm. In true Iron Man fashion, RDJ brought the party to his new friend. In two Stark Industries suitcases were fully-functioning bionic arms -- one for Tony, and one for Alex. The awesome appendage came courtesy of a new project from Limbitless founder Albert Manero, who's seeking to provide cheap 3D-printed prosthetic limbs for thousands of people like Alex. Though most of the new arms won't come with repulsors.