He has a thing where he grabs the ball infront of the stumps and knocks the bails off with his hands and pretends its a legitimate dismissal.
This was an error by the umpire standing at the striker's end who should have called no ball. Law 40.3 Position of wicket-keeper states:
"The wicket-keeper shall remain wholly behind the wicket at the striker's end from the moment the ball comes into play until
(a) a ball delivered by the bowler
either (i) touches the bat or person of the striker
or (ii) passes the wicket at the striker's end
or (b) the striker attempts a run.
In the event of the wicket-keeper contravening this Law, the umpire at the striker's end shall call and signal No ball as soon as possible after the delivery of the ball."




