You can hear the fear and the pain in Richie’s voice when he says Eddie’s name. Because Eddie was just on top of him, smiling and saying that he had done it.
Richie! I think I killed It for real
But then He’s covered in Eddie’s blood and Eddie is impailed on It’s claw and Richie’s horrified, hoping that this isn’t real. That he’s still trapped in the dead lights. Because he can’t lose Eddie. He just can’t.