I'm not thinking about pushing my knees forward. I'm pushing them out. So like if you were to look at my feet, I'm applying pressure this way (outward), so if they were able to slide, they'd be coming out (to the sides)... I'm standing here right now, I'm relaxed, knees are the straight forward, I can't feel my glutes at all. But as soon as I screw them out, when my knees come out... I can feel my glutes firing here.