Here is an interesting mod: The Shap shifter mod! It allows you to become any of the listed mobs and have the abilities that they have!

Each mob has a special ability you can activate it by pressing the "G" key
Change you mob type by pressing the "U" key

For example if you are an enderman you can:

Teleport by Right click (you can teleport as far as you can see!)

Get hurt in water

Mobs are now friendly

NOTE: If you are a mob with an ability that you turn on E.G. Enderman,Fish,Giant,(Etc)
MAKE SURE YOU TURN YOUR ABILITY OFF BEFORE YOU CHANGE TO CREEPER OR YOU WILL EXPLODE.

sorry about no screenshots

Some common problems are that the perspective is off when you are a mob, to fix this install the mod OPTIFINE before you install this mod then install this mod.

here is the link www.minecraftforum.net/topic/1171650-125-shape-shifter-mod/page__fromsearch__1