False Bang On

Start on the rail and move up to the lip.

Despite the height, there is a hole / chute below the crux of the climb, hence the "R" rating. Missing the lip may result in a nasty fall through the vortex of doom. As the Drtopo guidebook says "avoid sliding down the bomb bay".

Faces the opening to

Easy Mumblage

(can see straight through the cave that is Easy Mumblage) and is on the boulder to climber's left of

NRA

. Look for the bomb bay hole to confirm that it's the problem you're looking for.

Crashpad, spotters and some luck if you fall.