The pediatric patients were in trouble. The Joker had stolen their ice cream and stuffed ponies. Things weren't looking good.
But then the superheroes arrived, repelling down the side of Dell Children's Medical Center of Central Texas, to save the day. Batman, Batgirl, Captain America, Iron Man, Spiderman, Star-Lord, Superman and Wolverine and Wonder Woman foiled the Joker, and got the childrens' treats back.
"If they can take down this crafty crook, they can do anything," KVUE reporter Cori Coffin said. KVUE is ABC's Austin affiliate.
One little boy had a feeling it would all be OK.
"Batman's going to kick his butt," he told KVUE, referring, of course, to the Joker.
A day after the heroes saved them, the patients were still talking about it, hospital spokeswoman Kendra Clawson told ABC News. She said parents flooded the hospital's Facebook page with positive feedback.
"This was such a great experience for all the kids and parents," Misty Arrington Lake wrote on the Facebook page. "My son will remember this for many years!"