Correct under NHFS (8-5-2a) Momentum Exception: Applies to defense (intercepts the offenses forward pass, fumble or backwards pass; or recovers the offenses fumble or backwards pass) & R (catches or recovers a scrimmage kick or free kick) between their 5 yard line and GL; and his “original” momentum carries him into the EZ with possession + ball becomes dead
Since the defensive player caught the ball completely by his 8 YL, the momentum exception does NOT apply. When he went down in his EZ, it would then be by rule a safety [8-5-2] and the offense would have won by a point!