Bob was thinking of when I was rigging on the Phillip / Hunter St job and they had to rig up an electic signal to the crane driver because the doorman at the hotel used to give out two whistles for a cab. Then we had to have the electric outlets locked after a few on site thought that they where power outlets and drive the crane driver mad with continuall buzzing LOL. Great days had plenty of laughs rigging. Not unusual for three or four of us get into the slings and be lowered to the ground or raised up to the job.
That's the way the mop flops.
My thanks to Brian for this site.