Officer Joe Marte knows how to put a smile on your face.
The San Francisco Police Department officer busted some serious moves to cheer up Colren Guerra, a cancer patient at UC Benioff Children's Hospital in San Francisco.
Marte's uniform didn't stop him from taking on the break dance challenge, right after Guerra showed off his skills. He came in on his day off to entertain Colten, who's a huge Incredible Hulk fan.
The 5-year-old from Brentwood has a 2.75 inch tumor in his kidney and doctors at UCSF diagnosed him with Stage 4 Neurblastoma Cancer that has spread to his hips, one leg, spine, kidney, some ribs, and shoulders.
Doctors started agressive chemotherapy on Feb. 14 and are hopeful of beating the cancer.
A Go Fund Me page has been set up to help Colten "Hulk" Guerra and his family with "medical expenses, daily expenses, and just love."