Didn't appear to be a lot in it and I guess the only way to really tell would be the head on footage. Marks left arm popped up in the air just after Speeding Star went into a break but he could have been pulling the plugs at that exact time. If anything, Maybe a bit of tightening when the inside horse was trying to get off the rail. Brave decision by the stewards and Mark probably has every right to be annoyed.