I downloaded the skyrim monster mod and i had a hell lot of fun with it. But i noticed something strange.
Several monsters from that mod, along with ingame giants, mammoths and dragons seemed to have their movement bugged. Here is what happened:

The monster moves but in a stiff way. It is like fly hack. When it attacks, it show no attack animation. hell, it doesnt even move its legs. But it can still run around.
Upon death, i cant loot the monster and its position is the same stiff position as it was alive.

What the heck is going on.