You get something to throw at it but don't trow at it yet. When you have sommething to throw at it jump on the bouncy thing in front of you. When you are in the air wait for his metal blade to be right below you. When they are push: triangle then x. That will throw your weapon at the blades. That will hurt him but he won't die just yet. After a few hits he will pull out a lot of tires all around him but to keep yourself safe you have to wait untill he get close to you then jump on the bouncy thing in front of you. Keep doing that over and over untill you have won!