PRESS PHOTOS BY C. RICHARD CHARTRAND Window cleaning experts from Performance Services (PSI) Inc., Harrisburg, surprised children at Lehigh Valley Reilly Children's Hospital at Lehigh Valley Hospital – Cedar Crest Nov. 15 by dressing as superheroes and working outside their hospital rooms while dangling from the six-story, 89-foot-tall structure along Interstate 78 in Allentown. Seven individuals, dressed as Spiderman, Thor, Captain America, Green Lantern and Batman, along with two dastardly villains scaled the outside of the children's hospital, stopping at the windows outside each room to interact with the children. ABOVE: The superheroes begin their adventure for the children.

After they land, they visit with one young man, Michael Kennybrew, of Breinigsville.

The four superheroes scale down the wall for the children inside which they said were very excited and were knocking on the windows and waving as the heroes did their antics.

Spiderman turns upside down to the delight of the children.

The superhero window washers visit Lehigh Valley Reilly Children's Hospital.

The superheroes take photos outside of the hospital Nov. 15.