What it was though, was the only bridge for miles around. There was another one was just south of the Everfree, and another in Ponyville, and if they destroyed both of the other bridges, it suddenly became a lot harder for Faust to attack the south. As she wired the explosives underneath the bridge, Rainbow couldn't help but think they were only going to force Faust to go through Ponyville instead, which she really didn't want to happen.