With the growth of T20 leagues and batsmen hitting harder and further, bowlers like Curran have to develop new techniques and a slower, more effective ball to get their revenge.

Former England fast Steve Harmison, who deceived Michael Clarke with a slow 65mph yorker in the 2005 Ashes, said Curran’s ability to disguise the delivery is key to his success.

“You can see that its release point is much further back than [his off-cutter]”he said on TNT Sports.

“With the moonball, you just expect the hitter to get lost in your movement and body shape.

“He holds the ball between his index finger and thumb, throws it in the air and tries to maintain the same arm speed, but the ball comes out much slower from behind.”

Ironically, it is the lack of speed that kills.

The delivery that deceived Nissanka was slower than all of bowler Rehan Ahmed’s previous six balls in the innings.

“It hits, but I feel like if a batsman knows I can do something a little unique, like when you’re facing a mystery spinner, they might be a little more hesitant,” Curran said.

Tymal Mills, who played against Curran in The Hundred and T20 Blast, said it is a difficult variation to choose.

“I faced Sam in the Hundred and he threw it and it’s hard to hit,” he said.

“You have to wait so long for the ball and when you wait for the ball to come to you and it’s just floating out there.

“Obviously, the more you play it, the more kids will understand it. Like everything, I’m sure it will adapt again and you will do it in cycles,” he adds.