Squeegee-Wielding Superheroes Scale Tulsa Children's Hospital

Batman, Spider-man, and The Incredible Hulk were spotted cleaning windows at Tulsa's Saint Francis Children's Hospital Monday.

Not content with just saving the world from bad guys, it turns out this is what they do in their free time.

It created a spectacle for those outside the hospital, but the heroes said the best part was seeing the kids' reactions inside the building, as they popped up on each floor.