Dear Rascal ... I believe that all these things can be explained by simple mechanical processes.
Its just that the hand is quicker than the eye. Hi speed filming shows that the communication between the individuals acting in 'unison' is not instant but delayed between each individual.
The proof is that our travelling BBC correspondent, Mr MaKirk, a proponent of instantaneous communication, has signally failed to submit correspondence to this forum other than by the relatively slow speed of light. And only then from various far flung internet cafes. Hey Michael, are you reading this as I type ?
cool bananas ... greg