Scrap reccomends pushing down/off in order to punch, how exactly is this done?

[Scrap]

Yes they can, but not without the backfoot as the measuring stick for distance its about posture and being bipedal, and the thing an inch above the arsehole being your centre of gravity.

i dont understand that.

Watch a world class sprinter, Bolt produces 1200 lbs of force, happens when the driving foot becomes his rear foot. What controls all this is the posture of the head in relation to his coxxys, centre of gravity. Plus his Heels never touch the floor.