Near the end of the game you can kill Agro, and make the bridge disappear. It's quite amusing! To get this to work kill Agro as seen in the video, go back and save on a NEW slot. If you don't you'll mess up your game! Now go back to the title screen load that file. Agro will have respawned, and the bridge will be gone!
Mission? What Mission? There's no time to save the Universe, I have to go to Flux and have a dance contest! Join me on my adventures throughout the Mass Effect Universe.