AN appalling Snapchat video shows a laughing yob pour drink over a mum and her terrified young son's head in Burger King last night.

Bizarre footage reveals a man grabbing a cup from a soft drinks machine at the branch in Feltham, South London, before tipping its contents over the defenceless pair.

The child appears visibly distressed and is seen crying and clinging on to his mother after the unprovoked attack.

In terror, the mum begs the thug to “Stop it” before the man chucks the liquid, as the individual filming is heard gasping in amusement.

The Snapchat user @moboddy then turns his camera to show his grinning face which he clutches with his hand.

The mother is then seen trying to walk over to confront the assailant and the man filming the video while her son weeps.

But the Snapchat user continues laughing and humorously shouting “Oh s***! Oh s***!”

After the incident, @moboddy then decides to film himself and the assailant for Snapchat. The pair proudly pose and laugh at the camera.

The user known as @moboddy proudly points at the assailant.

He gloats to the camera: “Can you imagine that this guy went at her three times fam!” and then does a gesture to denote that he is crazy.

Social media users have condemned the vile attack taking place in front of the child.

@snr.kingpin commented: “Why do people do stuff this she’s with a child, is there no respect for elders anymore smh.”

Meanwhile @i_amtrouble wrote “How is that even funny, ya lucky not over my chid [sic]” and @xalisah lamented “Innocent kid smh”.

Whilst @ORiGinalanarchy said: “Not with the yute there comeon [sic]”