Here in Maine shooting while moving both forward and backwards is part of the LEO qualification courses.
We train on moving and shooting quite a bit, you never know when you might be clearing a room or advancing on someone and need to fire, or need to move to cover while firing. A little familiarity can go a long way towards putting rounds on target and it's always better to be accurate than not.
“Never give in. Never give in. Never, never, never, never—in nothing, great or small, large or petty—never give in, except to convictions of honour and good sense. Never yield to force. Never yield to the apparently overwhelming might of the enemy.”