You were running through the prison to get away from Yarnaby. He was opening his face and roaring while running towards you. The Doctor was yelling at you, saying things like "Stop running!" Or "You won't escape him".

You got into a vent when Yarnaby tried to follow you. But he ran into the broken metal bars, and his yarn mane got stuck. He tried to pull back, but it causes the yarn the tear. Making him whimper in pain and lay on the metal door