Zac Mihajlovic found an amazing use for his remarkable mix of film geekiness and engineering prowess.

The 29-year-old Australian spent over two years designing and building his own version of the sleek Batmobile used in the 1989 Tim Burton-directed Batman, complete with flaming afterburner. It’s street legal, which means he’s allowed to drive it around Australia and delight his fellow nerds. But instead of just using the Batmobile to live out his childhood fantasy, he’s using it to help actual children.

Mihajlovic has teamed up with the Make-A-Wish Foundation to bring his Batmobile to visit and delight terminally ill children, giving them a bit of fun and excitement in what are often very dark days. He even dresses up as the Dark Knight — his costume is more Christian Bale-era Batman than Keaton — to top off the big surprise. “Sometimes it’s knocking on someone’s door,” he says in a video about the car above. “Some of them run for their lives and it takes a bit of warming up to get them back into the Batmobile. But some are just super pumped.”

The charitable dork was featured on an Australian news show this summer, visiting a young superhero-obsessed boy named Domenic who is suffering from cystic fibrosis. Domenic often asks his parents to call him Bruce — as in Bruce Wayne, Batman’s billionaire alter ego — and as you can see here, he was just thrilled to hop in Batman’s ride.

Your move, homemade DeLorean owner.