Resident evil (2002). [Jill] Part 9 - Yawn boss fight (2nd Encounter)

After entering the balcony above the library, Yawn will appear. Rush down the ladder and immediately head for the narrow space behind the bookcases. This area serves to shield you from Yawn. He'll follow you in, but you can lead him on a merry chase in circles around the shelves. Since you're faster than him, you'll gradually catch up to his tail, which you can blast, and occasionally you can turn and take quick shots at his head.

Don't try to fight Yawn in the open. He's much more effective with room to move.

Smoke him with the Acid Rounds if your playing with Jill. If you're playing with Chris just blast away with your Shotgun 3 times as soon as the intro ends then go down the ladder and run until the camera angle changes then once he pokes his head out shoot him until he dies. He'll fall easily enough. You can also easily kill him with the knife if you train him around the bookshelf, it'll take a while though.