The Sport Academy explains what this chucking business is about - and gives you a guide to a good old fashioned legal ball.

The best way to destroy a cricketer is tell to them they are a cheat or a 'chucker'.

1. A normal start from Murali

In a recent survey of 100 top cricketers - 75% said that they were concerned about illegal bowling actions in the game.

But what exactly is chucking and how do we avoid it?

The above graphic is an illustration of a legal ball - the bowlers arm remains straight.

2. Up comes the arm

Putting it simply, a throw (according to the rules of the game) is one that comes from the elbow.

Darts players, javelin throwers, shot-putters - they all bend the arm to get maximum leverage from it.

3. His arm is not straight due to his deformed elbow

Bowlers must not or the umpire will call no-ball.

Muttiah Muralitharan, who has been put under scrutiny on many occasions, has a good excuse.

He has a slight deformity of his elbow, he is unable to straighten his arm.

You are allowed to have your arm bent, so long as it then does not straighten.

So although it may look like he is bending his limb when bowling, officials have decided, he is not.

4. Before he releases the ball

This means his action is within the rules.

Other players such as Brett Lee, Shoaib Akhtar and James Kirtley have also had the finger pointed at them for 'chucking'.

But the secret of avoiding controversy is to keep that bowling arm straight.

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Chucking explained

Usual suspects

Delivery position

Procedure for suspect actions

Reported by the umpires to the match referee Referee informs the ICC Advisory panel for Illegal Deliveries is created Panel look at video to decide whether or not the bowler is guilty If guilty, the player is advised to have his action corrected Home board then decide if player should be banned

FROM THE BBC >>
::	Struggling to 'chuck' it out of cricket