Must keep feet planted at the throwing point; Cannot fake or pump-fake throws; Must make a legitimate attempt to throw a catchable ball
Why people argue about this
People often assume that the thrower can pivot slightly with one foot as long as they keep their other foot planted at the line of scrimmage, thinking it's just a minor flexibility issue. Actually, the confusion arises because the rule is quite strict - if either foot moves off the line before or during the pass, it’s treated as an illegal motion, leading to that 1-point penalty.
