Pipe Petard Trophy in Skylanders Giants
Chapter 11 - Damage Drill-X by throwing a pipe at him
How to unlock Pipe Petard
Chapter 11 has a boss fight at the end of the chapter. The Boss's name is Drill-X and he is a big singing robot. In order to get this trophy you must switch to a Giant Skylander while fighting Drill-X, you will notice two pieces of pipe sticking out of the ground in front of Drill-X simply pick one up with and throw it at Drill-X. This trophy will unlock after the pipe damages him.