you and Beverly were together in the sewers, looking for Pennywise. You hear a noise and turn around timidly. When you go to look back at Beverly she was gone

you look around the sewers and about 30 minutes later you find Beverly under the effects of the deadlights; levitating and her eyes pure white. From what you know the deadlights make you see horrible things until it's broken... You just don't know how to break someone out of it..