As Officer Andy Anderson searched the railway tracks, the approaching train blared its horn, repeating it until the horrifying moment the speeding engine smashed into the hapless policeman - and it was all captured on video.
The officer, from Polk County in the US state of Georgia, was chasing a suspected burglar down the train tracks when the incident occurred.
The collision was captured by Anderson's 3D body video camera and shows him walking the track while looking for the suspect, as the sound of the approaching horn can be clearly heard.
He doesn't appear to realise the danger he is in, continuing the chase for the alleged burglar before the train slams into him and sends him flying into the bushes.
READ MORE:
• Chicago police release body cam footage of shooting
• US police officer's body camera records him abusing a corpse
• Watch: Las Vegas police body cam shows officers storming shooter's room
• A cop fires. A teen dies. Yet six police body cameras somehow miss what happens