You want to be able to do this, right?
And not mess it up like this?
1.
Put all your weight on the ball of your foot you intend to keep still
3.
Slide on the HEEL, not the ball, of your foot
5.
The length of your stride should be the same as when you walk normally
6.
Keep your upper body moving at a constant speed backwards and without bouncing
Now you'll always have a way to escape from awkward situations