If check_target_facings()
happens to return FACING_INIT_FACING_TARGET_TARGET_FACING_PERPENDICULAR, which is very possible if you're attacking your target diagonally from the front, as the conditions to return that define are just 'targets are facing perpendicular to each other'.
This is a valid backstab.
we tf2
at minimum this is extremely unintended, as ergo wanted it to Actually Be A Backstab and this, uh, isn't.
Most helpful comment
we tf2