Typical day. A couple of the ten on that day...and the LAST warm day of Fall 2023, frozen ground and now snow will "grace" the next couple of video's.
You get more lift over distance driving the wedge sideways, as opposed to with your backcut, especially with a long/banana wedge.
There's also angling the face cut with the highside being the direction of the increased pull. Your back-cut/hinge still has to be parallel with the face, both being out of angle with the trunk. Combined with a Dutchman and/or wedging (especially from the downslope of the backcut upward), you can get a good majority of trees to swing 90*+, all factors pending.
Many leaners can already be cut 90* if they are small enough, just by not cutting with the lean; just as often, limb-weight contradicts that and you expect to meet in the middle. Last-ditch efforts could involve nipping holding wood off the face (interior or underside, different circumstances) or hinge to undermine or twist/spin the tree free.
Always interested to see the clone-saws in action!