This incident took place in Perth in 1988 when the West Indians toured Down Under. In the 2nd Test, on the 3rd of December, Merv Hughes had Curtly Ambrose caught behind with the last ball of his 36th over. He removed Patrick Patterson with the 1st delivery of his 37th over to end the 1st innings of West Indies. This meant he had taken 2 wickets in 2 balls and was on a hat-trick. (He finished the innings with 5/130).
The Australians batted the remaining overs of the day and were bundled out the next day, i.e. 4th of December with a few overs for the day remaining. Once the 2nd innings of West Indies began, Hughes ran in to bowl with a hat-trick on and removed Gordon Greenidge off his first ball with an L.B.W. and completed his hat-trick. (He took 8/87 in that innings and finished with 13/217 in that game. He was awarded the Man of the Match award for his performance, though Australia lost the match by 169 runs.)
This hat-trick of his was completed, not only in 3 different overs, but also in 2 different innings and spread over 2 days. Interestingly, Hughes did not even notice that he had taken a hat-trick and had to be told about it.
1) First wicket is on last ball of the over(8th over).
2)Second wicket is on last ball,when a other bowler suffers an injury after bowling 5 balls and captain ask him to bowl last ball and he gets his second wicket(10th over last ball).
3)Third wicket is on first ball of his next over.(12th Over)
finally Bowler succeeded in getting hat-trick but they may realize after the completion of match.