Wolfen at the Cave

Snapping back to his body fully, Pathfinder gives a short howl to announce to Waterstrider that they've been found right before he leaps straight upwards to get himself out of the way. He anticipates a tail strike when he's midair, so spins his spear so the point is downward, jagged side up, so if one should occur, he need only lift his spear a fraction of an inch to be able to slice through any flesh it meets.

Waterstrider, hearing the howl, doesn't bother with stealth any more and sprints out of the cave opening, unaware that the fight is literally right above him.