From the text (p.57-58):
“…If successful, the character is behind his opponent. The opponent can now be attacked with a +2 bonus to the attack throw, and gains no benefit from his shield. Thieves and others eligible to backstab an opponent gain their usual +4 on the attack throw and bonus to damage…”
Now is this a very ambiguous way of saying “Thieves and others eligible to backstab an opponent do not gain this bonus…”. or does it mean that a thief or other classes eligible to backstab who succeeds in the proficiency throw will get the +2 acrobatics bonus and their +4 backstab bonus?
This ability triggers a thief’s backstage ability because normally a thief cannot use backstage after combat even if behind an opponent. But characters without backstage/ambush still get a +2 to hit.
Yup. And at high levels, they can more or less pull it off every round. Kind of all the benefits of the various tricks to provide flanking or flat-footed, without all the bothersome tracking of position and placement.
