Joey Grundl, a pizza delivery driver for a Domino's Pizza in Waldo, Wisconsin, is being hailed as a hero for noticing a kidnapped woman's subtle cry for help.

The delivery man was sent to a woman's house to deliver a pie when her ex-boyfriend, Dean Hoffman, opened the door. Grundl looked over his shoulder and saw a middle-aged woman with a black eye standing behind Hoffman. She appeared to be mouthing the words: "Call the police."

"I gave him his pizza and then I noticed behind him was his girlfriend," Grundl told WITI Milwaukee. "She pointed to a black eye that was quite visible. She mouthed the words, 'Call the police.'"