that if you BELIEVE it is battery acid, then it will hurt him.
They did something like that though. That Gun thing that Mike brought with them, they were yelling at Bill that it wasn't Loaded, but Bill believed it was loaded, so it hurt Pennywise.
I forgot about that. But it blended in so much with all the violence they were doing to the clown in general, that the detail that they were hurting it only because they believed to be was a little overlooked. I'll give it credit for showing it a little bit. And honestly having Bill be the one that discovers this is better since Bill is the one that does stay in Derry and further investigates It. Makes more sense from a character perspective. I guess I'll divert my criticism to how it focused too much on being an action fight rather than the spookiness and atmosphere of Pennywise's lair and what it all meant.