Choose the Decepticons and choose "The Hunt For Sam Witwicky" level. Go to the sports shop next to the mall. Then, go to the gas station and face the mall. There should be a jump. Transform and go off the jump into the building on the right. Note: Make the jump off the side of the ramp and use boost when you are close to the ramp. When Barricade hits the building, make sure that he lands upside down (do not transform when this happens). Wait a few seconds and Barricade will flip over. When he does he should be bouncing up and down with his wheels on the ground, sitting still. This may require a few attempts.