Generally agree w/all the advice, I usually have 3 size saws (4 saws, the 2-70s just seem to be able to do everything), and I have double/triple cut a lot of times also to avoid a pinch, and even cut with the second saw right next to the pinched bar to relieve the pressure an let it go free, but sometimes when a tree goes down hard and there is internal splitting, you don't see the pinch till it grabs you. It is always nice to be prepared to get out of it.