I've seen both movies. I had the book and stopped reading it about halfway through because I lost interest.
In the new movie which came out last year, every time It bleeds his blood floats out of him and later in the sewers when the kids are fighting him his blood and pieces of his true form float out of him slowly like there's no gravity. Also, the kids floating, how does that happen? I realize the reason why they are floating is because they were afraid when they saw the deadlights and Beverly only hovered after she saw the deadlights, because when she saw them she wasn't afraid of it after standing up to her Dad.
So, how does everything float, including Its blood? I do realize it emphasizes the phrase "we all float" or "you'll float too" but I just want to know how.
Even theories are OK if nobody knows.
I'm very excited for the second movie, btw.