Send an opponent through all three Metropolis transitions in one fight [Silver / 30G]

This can only be done in the Metropolis arena. The trophy / achievement can be unlocked in Practice Mode. Your opponent won't move and time doesn't run out. Dash towards the enemy to push him to the other side of the arena. Once you reach the end, press + X (PS3) / + A (X360) to send the enemy through the transition. There are three transitions in this arena and you have to send the opponent through all of them.
The trophy / achievement will pop during the match.