Ah, I see better now what’s going on. Thank you. I think my confusion was mostly due to my not visually understanding the angle of the bone. In the video you manually adjust the angle of the shin bone a bit, then pause, and then snap it to 90 by just typing it in numerically. On the screen I was viewing it on, it looked like it was already “pointing” in the right direction at the end of your manual adjustments right before you paused. So then after you typed in 90, it looked like it snapped past that, and I was like “huh?”
Thanks again for the expanded explanation and knowledge drop.