Robert Downey Jr. delivers a real bionic arm to a young boy. ©2015 YouTube, LLC Special uses

Robert Downey Jr. delivers a real bionic arm to a young boy.
©2015 YouTube, LLC
Special uses

(Relaxnews) – Robert Downey Jr. — aka Tony Stark  — helped deliver a real bionic, Iron Man-inspired arm developed using 3D technology to a boy with a partially developed arm in a YouTube video that has gone viral.

Since being uploaded Thursday, the video of Downey Jr. and Alex, a dapper seven-year-old who loves superheroes and biking, has been seen by more than 2.4 million viewers.

In the video, college student Albert Manero, who builds and donates low-cost, 3D-printed bionic limbs to kids around the world, surprises Alex by introducing him to another “leading bionics expert.”

With valiant effort, the boy conceals his excitement under an ear-to-ear, dimpled grin as Downey Jr. compliments him on his choice of bowtie, and presents him with an Iron Man-printed bionic arm.

Watch the two fist pump at http://bit.ly/1BwbEGG.

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