Video shows a fearless granddad decking a 20-stone thug who headbutted him after a bizarre row about garden WEEDS.

Gary Wynn, 35, attacked Keith Thomson, 72, after verbally abusing the pensioner’s wife Susan who was clearing up the communal path.

Footage shows Wynn launch a foul-mouth tirade at Mr Thomson and his wife, branding him a “c**t” and “p**k” before ramming his head into his face.

Mr Thomson bravely swung a punch back at man-mountain Wynn before staggering back into his house in Kidderminster, Worcs.

Mr Thomson said the row started when Wynn flew into a rage at his 78-year-old wife.

The retired builder said: "My wife was cleaning up the path which runs between our two properties and doing some weeding.

“We’ve lived in this house since 1993 and paid rent to a housing association.

“We try and keep the paths clean and tidy for the benefit of all the residents here.

“Suddenly Wynn comes storming out shouting and swearing at my wife calling her a
‘b**ch’.