I almost snorted coffee out my nose reading this. On a big job one time, I and my expert climber were in the same tree (a large big -eaf maple with around 2 tons of ivy in it) At one point my three guys on the ground all disappeared. Had to climb down and move brush off of our ropes. It seems it took three guys to obsessively use the same spot to pile limbs and ivy, so they all piled in the pick-up and chopped brush for an hr out of ear shot and sight. (We were dumping the un-chippable junk in a ravine).
Sigh. Times like that make you want to hit 'em with a small chunk on purpose to get their attention. I didn't want to be the baddie, so i told the group that there was a "miss-communication", but told them one at a time that what happened was not acceptable. You tell groundiies that there is an order of importance: stay out of the way, look at the climber every few minutes, keep the LZ and ropes clear, THEN drag brush and VERY LAST cut up wood.
Perfect storm of headuparse. Make another pile!!