Dennis Lillee’s aluminium bat saga.

43 years ago Dennis Lillee’s aluminum bat saga.
It was the first Ashes Test between Australia & England played at WACA. The incident happened day 2 during Australia’s first innings when Lillee hit Ian Botham down the ground for 3 runs. Nothing unusual happened except for the sound Lillee’s bat made when it hit the ball. It’s more of the “clunk” type of a sound rather than the usual sound from the wooden bat. This prompted England skipper Mike Brearley to complain about the bat to the umpires. His reason being it could damage the ball since the bat was actually made using aluminum material.
Lillee responded to the complaint stating there was nothing illegal about using that bat. However after stopping the game for about 10 mins & making the Australian skipper himself to come down to take control of the situation, Lillee finally gave it up. However he did it by throwing the bat several yards towards the pavilion showing his displeasure. This incident later made for a rule change prohibiting using bats made from any other materials except wood.