If this video doesn't make you love Robert Downey Jr. even more, then we don't know what will.
The 49-year-old Iron Man star recently presented a bionic arm to a 7-year-old fan named Alex, who was born with a partially developed right arm. The arm was built by college student Albert Manero, who builds and donates low-cost, 3D-printed bionic limbs for children around the world.
In the heartwarming video, Downey Jr. remains in character as Tony Stark, referring to himself as a "leading bionics expert." For his part, a snazzily dressed Alex impressively retains his cool demeanor throughout the video, but watch for the cute moment when he acknowledges that he's sitting next to "Iron Man."