An unsuspecting swimmer has narrowly escaped the jaws of death after being stalked by a large crocodile at a Mexican tourist beach.
A video posted on YouTube shows the crocodile following just metres behind the swimmer as he makes his way to the beach, seemingly unaware of the unwanted company.
The gap was closing until someone throws an object in front of the reptile to scare it off.
The footage was taken at Sian Ka'an, a tourist area renowned for its crystal-clear waters and crocodiles.
Messages on a popular tourist advisory site offer reassurances that swimmers would not be allowed in the water if the reptiles were a threat.
"No worries about crocs," one post says.
The swimmer in the video might offer a different view.