PHOENIX -- A retired Valley man, taking a stroll with his wife, wound up in the hospital fighting for his life after a hit-and-run involving a bicyclist.The incident happened Monday on a canal path in north-central Phoenix.The victim, 81-year-old Tom Cross of Apache Junction, is still sedated at John C. Lincoln Hospital with a severe head wound."We always thought Dad would fall off a mountain, not get run over on a sidewalk. It's heartbreaking," his son, Dale Cross, told 3TV. Tom and Lillian Cross live an active lifestyle, spending their days hiking and their nights dancing."He's a beautiful dancer," Lillian Cross said.Tom Cross was hit from behind by a cyclist, who took off without braking to check on him."I was screaming, 'Help, help, stop! Come and help us!' And he didn't even look," Lillian Cross recalled.Jane Powers heard the screams and ran to help. She found Lillian Cross over her husband's body."I hate the fact that somebody would do this," Powers said. "I wouldn't want to be that person right now."Powers has since put up a sign on the trail to inform people about the incident, and to warn bicyclists and walkers of the danger.Police do not technically consider the incident to be a crime. It happened off-road, and there was no intent to harm Tom Cross. Still, officers stopped by the hospital to take a report."I'm not looking for vengeance," Dale Cross said. "Somebody just needs to let him know what he did. Someone needs to know that he hurt someone's family."