How Stupid Do They Think I Am?

Today, as I drove on the freeway, an ambulance came up behind me.  I knew it was an ambulance because I looked in my rearview mirror, and I could read "AMBULANCE" clearly stencilled across the vehicle's hood.  I took a moment to say a silent thanks to whoever first came up with the idea of printing the word "AMBULANCE" backwards on the hood.  Because if a giant white truck came up behind me, sirens blazing, and I saw "ECNALUBMA," I would have NO idea what to do!