What is this ghost like being that is in the nether?

So I have a Modded 1.7.10 Minecraft game, and occasionally while I'm in the nether, I get lifted off of the ground by some unknown being. When I die, it says I died from fall damage, but there's something I can't see lifting me off the ground. When it happens I also hear a strange sound, something like an apparition would make. I'm creeped out because this isn't something I've ever seen anyone else experience before.

Something

Try finding the monster in creative with spawn eggs