It's often talked about just how similar Robert Downey Jr. is to his Marvel alter ego Tony Stark, but that streak apparently runs a lot further than people realise.
RDJ went full superhero this week when he met Alex, a seven year-old Marvel fan with a partially developed arm.
Working with Albert Manero from the Collective Project, Robert showed up with some Stark Industries-branded cases, one of which included a 3D printed bionic arm designed to look fresh off of the Iron Man armour.
What's more, he even brought along a gauntlet from the real suit, so that the two of them could hang out in Iron Man mode while Alex got used to his new prosthetic.
The video of the meetup has gone almost instantly viral, and RDJ's fellow Marvel stars have weighed in to slap him on the back.
And he's not the only MCU character who's a real-life superhero; his fellow Avenger Chris Evans visited children in a Seattle kids' hospital this week in full Captain America garb, as part of his Super Bowl bet with Chris "Star Lord" Pratt.
Chris Evans and Chris Pratt are awesome. Here are some pictures of them visiting a children's hospital together. pic.twitter.com/AnDzjjPlN8— Digital Spy (@digitalspy) March 8, 2015
With all these real-life good deeds happening in the build-up to Avengers: Age Of Ultron, we are more than happy to say "Make Mine Marvel".
Check out the awesome video of RDJ and Alex hanging out with their Iron Man arms below.
[GIF credit: letsgetdowney]