Subject: [MODS] Humans+ v1.3 & NotchMobs+ [Beta 1.2_02]

Hello, man. I'm sure you're busy and all, but I kinda have an issue. (In advance, yes, I have installed all of the textures for the mobs) There is some sort of invisible entity that will sometimes kill me out of nowhere. It leaves the trail of bubbles when it's in water. It makes footsteps as well. However, it is unkillable. I have tried. I have some footage, take a look:FYI, I apologize in advance for two things. The quality of the video, and worse, the audio. I'm fourteen in a month, and I sound like a 10 year old Xbox LIVE troll. (Hey, don't make fun of me, at least my puberty is moving along at a faster pace than Bieber's, eh?)So, yeah. Here:
UPDATEThe footage won't play.
Anyway, it'll just start killing me.