When the 42-year-old told The Falkirk Herald that krav maga was "full on" he was deadly serious.

The gun pointing at his head was made of rubber and the impromptu demonstration of how to disarm an attacker took place at Grangemouth Leisure Centre, just before the instructor held his first Thursday night krav maga class there.

The classes, which also ran a couple of years ago, are back because krav maga has become more popular than ever – the fight scenes in the action-packed 'Bourne' series of films featured some of the no-nonsense moves.

This 'contact combat' form of self defence originated in Israel and is used by their security forces – in fact every young man called upon to do their national service in that country learns krav maga.

And, if Fraser had his way, the police in this country would be using krav maga too.

"We don't teach it to police officers officially, but every police officer I've taught in my class has said they wish it was,'' he said.

''It would be great if every police officer in the country was taught krav maga."

So why is krav maga proving so popular?

"It works," said Fraser. "It's as simple as that. You've got Jennifer Lopez and Angelina Jolie learning it and of course it was in the 'Bourne' films.

"There is only one speed and that is full on. It's easy to learn because it's based on what the body does naturally when it is under attack.

"It's much more practical and effective than martial arts – much more direct and to the point. It's a lifestyle – it's like driving, once you learn it you never forget."

Not just about learning a series of moves, krav maga is about learning an attitude to life.

''Krav maga is a way of life and shows you how to protect your personal safety,'' Fraser explained.