felling cuts tricks of the trade

[darkstar]

when i started tree work 20 years ago i lucked up on some old school loggers who helped me learn ... we used to talkl= about a twist shank cut. or an ice cream coner cut ...or the chicken head lop .... any way all the came felling method which if done properly can drastically change the direction of a heavy leaner .. i found this cut described in a book but was never bold enough to try it ... basically you plunge the saw in the tree and cut a spiral down the tree until at the last moment the tree begans to fall and you cut really fast making the tree twist and fall against its lean .... you guys ever do this ? what about other really crazt felling methods ??? dark