The basic tenet of origami is to create an object - a bird, cube, monkey, etc. - using a single piece of paper. And while for the most part this is possible, there are notable exceptions, including modular origami and this menacing red bull.
Just take one look at the bull and you know it takes more than just a single sheet of origami tissue paper to get the job done. The very detailed origami project features finely sculpted, muscular legs, and a very complex face. If you're an advanced origami student and would like to challenge yourself, check out this tutorial.