Need some help in fallout 3 for xbox360

I saw on youtube someone cowtipping the brahmin (2 headed cows). I dont know how to do this pushing motion.

I also hear about people throwing people over balconies (like the owner of the tower) - I dont know how to do this.

I also hear about people dragging dead bodies around - I dont know how to do this.

please advise.

I don't completely follow that. I have a bonesaw in my inventory - but I can't equip it or anything

I'm assuming that you're playing on a console version. Put the object you want to pick up under your cursor and click the right stick to pick the object up. Click the right stick again to let the object go.

You can use this to drag objects and bodies around the world. I don't know if it will help you tip the brahmin, but I'm guessing that it will.