screen grab of rescue
Media playback is unsupported on your device
Video

Florida medical student saves 92-year-old from lake

A medical student is being hailed a hero after he dived into a lake in Florida to save the life of a 92-year-old man.

Alton Brieske was having lunch in Port St Lucie when he saw Salvatore Mancuso lose control of his car and plunge into the water.

ABC's Amy Robach reports.

Go to next video: Woman rescued after car cliff plunge