I'm curious about something... Last night, after dark, I heard this god-awful sound coming down the road in front of my house. I went outside and first of all, a horrid smell of something burning hit me, don't know it it was related to the noise or not. It was an acrid sort of burning smell. Anyway, the noise got closer and then I saw it drive by, about the size of a dump truck, or ambulance, it was higher than a car, or regular pick-up truck, and it had a few lights on the side. This noise was like nothing I have ever heard in my life! So loud and like a screeching kind of scream. As it passed, I could still hear it about three miles down the road. What would cause a vehicle to make such a noise?