Something Squirrelly this Way Comes

You are driving in a car at a constant speed. On your left side is a 'drop off', (The ground is 18-20 inches below the level you are traveling on), and on your right side is a fire engine traveling at the same speed as you. In front of you is a galloping horse, which is the same size as your car and you cannot overtake it. Behind you is a galloping zebra. Both the horse and zebra are also traveling at the same speed as you. What must you do to safely get out of this highly dangerous situation?

For the answer, check the comments.

Unrelatedly
I got about four hours sleep last night and the wintry mix they've been forecasting is more rain than wintry. Tho there is some sleet. Regardless, I get to go frolic about it in it and get paid. And likely wet and muddy. :)