It made animals continue moving whilst they attacked you, so you couldnt simply run away from them.

* found the mod -

http://www.nexusmods.com/oblivion/mods/31882/?tab=1&navtag=http%3A%2F%2Fwww.nexusmods.com%2Foblivion%2Fajax%2Fmoddescription%2F%3Fid%3D31882%26preview%3D&pUp=1