Grandpa beats up burglar.

From News.com.au:

A would-be thief made the worst mistake of his career after breaking into the house of a retired Army boxer.

Gregory McCalium, 23, fronted court yesterday with a black eye and a fat lip after he was busted - and subsequently bashed - by 71-year-old Frank Corti in Mr Corti’s house in Oxford, UK.

Mr Corti said he was woken in the middle of the night by noises in his house and was confronted by the knife-wielding McCalium when he went to investigate.

He said McCalium “took a slash” at him, but Mr Corti ducked and threw two big right hooks at the lout.

And Mr Corti knows how to throw a right hook – he was famous for it as a featherweight in the Royal Engineers.

The blows almost knocked McCalium out, allowing Mr Corti to perform a citizens’ arrest and wait for the police.

McCalium’s lawyer told the court his client “looked like a car accident”.