Especially for Chris Hill.
Something about the laws of cricket.


7. Movement by fielders
Any significant movement by any fielder after the ball comes into play and before the ball reaches the striker is unfair. In the event of such unfair movement, either umpire shall call and signal Dead ball. Note also the provisions of Law 42.4 (Deliberate attempt to distract striker).
8. Definition of significant movement
(a) For close fielders anything other than minor adjustments to stance or position in relation to the striker is significant.
(b) In the outfield, fielders are permitted to move in towards the striker or striker's wicket, provided that 5 above is not contravened. Anything other than slight movement off line or away from the striker is to be considered significant.
(c) For restrictions on movement by the wicket-keeper see Law 40.4 (Movement by wicket-keeper).