See Robert Downey Jr. As Tony Stark Give Boy 'Iron Man' Arm

Robert Downey Jr. surprises a brave young  boy with no right arm with his very own Iron Man arm.

Seven-year-old Alex Pring was brought into a room where Downey stood, dressed as his Iron Man character Tony Stark and said, "I thought I'd bring one of my gauntlets to match it up with yours and see if everything is copacetic. Want to have a look?"

"Sure. Each one looks the same!" exclaimed the boy.

Downey said, "Actually, I think yours might be better than mine. What do you say we both try them on and do a progress report?"

When Downey Jr. saw the arm in action, he exclaimed, "God, it's even cooler than I thought."

The actor posted the video on his Facebook page.  

The bionic Iron Man arm was made on a 3D printer by Limbitless Solutions and it instantly turned seven-year-old Alex Pring into a super hero.

Then two did a high five with Alex's new arm as Downey Jr. said, "Bang! Nailed it. Love it."