Aaron Arias, 19, and Jamal Harris, 17, noticed the woman mouthing "help me" and immediately phoned the police.
"It's me and another guy. So we're checking out the girl in the backseat because, we're like, 'OK, she's kind of attractive,'" Arias told the 911 dispatcher, "and then all of a sudden the guy is turned back, looking at us. We looked in the backseat and the blonde female in the back was saying 'help me' or something, whispering it."
A short while later, officers arrived on the scene and pulled the suspicious car over.
Sure enough, the 25-year-old woman in the backseat was indeed in the process of being abducted.
Police say the driver of the vehicle, Charles Atkins Lewis Jr., 37, forced the victim into her own Lexus at gunpoint as she was leaving an office party in downtown Dallas.
Atkins was subsequently arrested and booked on a charge of aggravated kidnapping. He remains in jail in lieu of a $50,000 bond.
The unidentified woman, who was not injured, met her saviors after being rescued and gave them a big hug.
"I would describe it as the best hug I have ever gotten," said Arias.
[videos via ABC News]