gabowman,movement should always be kept to a minamum but when useing lights your forced to move your head around.you can do it both ways it realy dosn't matter.the important thing is to make your moves slow and deliberate,don't be jerking your head side to side.if its realy dark out you can get away with a little more movment.when useing an e-caller at night make sure the call box is close to you,if its to far away(like with a remote)you may not see there eyes relecting becouse there attention is on the e-caller.you want both there eyes looking in your direction.