ghost was on a mission exploring an abandoned hospital he was walking around when, he heard a small bat like noise, but what?

you were a small vampire bat, you found a small vile of blood and let out a small bat squeak, you bent down and grabbed it but once you stood back up, you hit your head on something, ghosts' chin, you got scared and fell onto the ground and curled into a ball your long bat tail wrapping around you and your large bat ears against your head

Ghost:"who are you...?"