I've heard a few ideas on how to avoid this since it happened, but I think more awareness and standard practices are warranted: I was dropping a cherry tree a few years ago. It had a large lateral branch pulling it the opposite direction from where I wanted it to go, so I gaffed up with a steel-core flipline to drop the branch. Evidently my notch cut was not deep enough, because as I began making the relief cut the branch split all the way back to the trunk and pulled part of the trunk away too. The only thing that stopped that mass of wood from peeling away was my flipline, which pulled me by my harness and crushed me against the other side of the trunk. My body was pinned and it took all my strength just to breathe. My buddy on the ground asked if I was OK and I could barely get out a distressed "No!" But there was really nothing that could be done from the ground. Fortunately, my saw was still running and my arms were still free. I was pressed so tightly against the trunk I couldn't see around it, but I knew I had to break that opposing branch before I blacked out, so I squeezed the throttle and just tried to keep the saw running against the top of the branch. Finally it broke and dropped, which relieved the weight on the flipline. So far the only practices I have heard that could have mitigated this are: Before cutting, loop the flipline once around the trunk. Reconnect the flipline above the crotch when cutting.