Didn't pay attention to my rigging points as I worked my way down the tree and started rushing the job.
Had two pulleys set up, one on the tree I was in and another set and a 5" branch on a neighboring tree. I worked the whole tree with no problems. I started chunking down the trunk and was getting a bit anxious to get finished (needed a bathroom brake), so began taking 6' log sections. I was getting farther down the trunk and forgot to move the pulley down on the neighboring tree being the weight was too much and now having two pulleys were almost useless being the angle at the top pulley was about 15 degrees. I cut the next piece and as soon as it was pushed off the spar the top of the neighboring tree broke out. I must have been one lucky SOB. My ground guy though I was a goner. The top passed by just a few feet from me. By the time I knew what was going on every thing was already on the ground. Got real lucky, no property damage either.
Taught me a good lesson that day. Double check everything, and don't rush cause that is when mistakes happen