i can be a mean SOB, when on tractor, ya simple do not come near me, or you will either die, or i will chew your head off, if not able to reach over and rip it off with my hands. i will make the person cry. if they try and talk back... even if i can hear them i will completely ignore and act like i can not hear them. due to most of the time sound of tractor over whelms everything else. my hands signs will tell them to get the heck out of there and don't come back. end of story.
i tie the dogs up, when on tractor, to many close calls over years, there to small to be seen when right up on a rear tire. and spend more time looking around for them than actually getting work done.
if someone wants my attention, they stand complete off to the side, and wave me down, and only approach if i wave for them to come close to me while on tractor and it is at a dead stop. no exceptions.
============
working with another person, that you know is there, is a bit different ya work together to keep each other safe, and always keep a direct line of sight on the spotter / helper. and if they get in a blind spot, ya stop tractor and yell at them to get there butts in gear and pay attention. and to keep in line of sight at all times. and that they are at a far enough distance from tractor, and have a way to "easily escape" if need be.
some helpers / spotters, wanting to keep busy vs just standing there watching you/tractor, and try to end up doing something else. and that is about time, ya gotta tell them to STOP doing what ever! yes, you both most likely think it is productive. both of you going at it. but... that is about the time something happens. it can be a boring being a spotter / helper at times. but that is what it is. 2 folks using tractor a few minutes or 2 folks spending a few hours manually doing what ever... take your pick, not both.
there is no reason for a spotter/ helper putting extra stress on the operator of a tractor. by jumping and moving all about and doing other stuff between this and that. remember if you are the helper/spotter, they have your life in there hands.
=============
running over a 4x4 piece of lumber to a stump, to running over a person, the operator may never feel a thing or even notice that they did. till is well a few minutes later and the dead is done, and someone 7 foot under.
=============
i am all for folks getting out there and getting experience and learning and getting things done, but those times are more of a training excersise and the person on tractor and spotter/helper kinda go at a slower pace as they figure things out and learn this and that. but that is completely different thing than above.