Towards the end of Chapter VIII (8) you will be in control of a Decepticon named Bruticus. You will be smashing your way through the level and you will notice some goal post through out this part. Try to line up the Autobots near the goal post and smash them to send them flying in the air. It's easier if you find a group of Autobots standing in front of a goal post, since one smash will have them flying through the goal post. You will be asked to make a choice, after destroying several Autobot cars, to go right or left. If you choose the right path, there will be 2 Autobots standing directly and perfectly alined in front of a goal post.
Here is a great video guide by Kal_El showing you the area to obtain this.