Stag Rearing Attack: Faces Away From Enemy

I watched a fight between a stag and a wolf. The stag would face the wolf when it head butted while on all four legs. However, when it reared up on it's hind legs to REALLY head butt the wolf, it rotated 180 degrees and head butted nothing. The wolf still received damage. When the stag was back on all fours after the animation completed, it rotated 180 degrees to face the wolf again.

SotA build 414.