Foul: any non-incidental contact between players; called by the affected player → "contest" or "no contest"; if contested, disc returns to thrower; Travel: moving the pivot foot after catching; disc returns to thrower; Pick: defender obstructed; defender call → play stops + resume at point of obs...
Why people argue about this
People often assume that if a defender obstructs an attacker during a pick play and is called for it, the disc should immediately return to the thrower of the previous play instead of staying where the obstruction happened. However, this rule specifically states that play stops at the point of obstruction, ensuring continuity in gameplay rather than disrupting it with frequent turnovers.