Robert Downey Jr. visited a special youngster as Tony Stark and presented the young lad with a very special gift. Seven-year-old Alex Mead, who was born with a partially developed right arm, received a 3D-printed bionic Iron Man arm. How freakin' sweet is that? Although it does not shoot missiles, it can do a pretty wicked fist bump, which you can see in the video above.

"Had the absolute privilege of presenting a brand spanking new 3D-printed bionic Iron Man arm to Alex, the most dapper 7-year-old I’ve ever met," Downey said on his Facebook page.

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