If it's in there what does the case book have for this play that's been discussed?
B26 intercepts A14’s pass at the B-4 yardline. His momentum takes him into the EZ, where he is hit and fumbles. The fumble goes OOB at the B-2 yardline.
I searched for your play, and they did cover it. Momentum does still apply.
4.3.1 SITUATION E:B1 intercepts a pass on B's 4-yard line with his momentum taking him directly towards his goal line and into the end zone. B1 fumbles from the end zone into the field of-play and out of bounds at the 1-yard line.
RULING:For the purpose of administering this play, the ball is returned to the spot of the fumble. The momentum exception in 8-5-2 applies and it will be B's ball, first and 10 at B's 4-yard line. (8-5-2a EXCEPTION)
COMMENT:Had the fumble occurred in the field of play prior to crossing the goal line, the momentum exception would not have applied and the ball would have been returned to the spot of the fumble.