WATCH: Dad poses as Spider-Man, jumps from roof for terminally ill son's birthday


"I wanted to surprise him so much with one of his favorite heroes, so I found two costume designers who were up for the challenge," Wilson, who is British, told The Independent. "We had the costume printed in America and then got to work putting it together."

Wilson, described by KTLA as a parkour enthusiast, posted a video of the Spidey stunt to YouTube on Sunday. By early Tuesday, the video had received more than 700,000 views.

“He's such a little hero, and we want the world to know about his journey," Wilson said.