On Boxing Day 1995 at Melbourne Cricket Ground, a 23-yr-old Sri Lankan offspinner Muttiah Muralitharan came on to bowl. In 3 overs, Australian umpire Darrell Hair called him for throwing (chucking) 7 times. Muralitharan was taken off. But 10 mins later, he returned to bowl from the other end.
There, New Zealander Steve Dunne, watching the same action, said nothing. Dunne later explained that it was a conflict between law and convention. Laws of cricket permitted either umpire to make the call.