The summer after high school, I had a job driving trucks at night, back and forth between Clearwater and Ft. Myers, Florida. The road between Sarasota and Ft. Myers back then was pretty much completely desolate country, just endless marshland interspersed with open cattle pastures.

So, I am just cruising down the highway, 67 mph, because the truck had a governor on it and that's as fast as it would go.
It's about 2 am and the road is mostly empty, save the occasional truck going the opposite direction, and 1 set of tail lights I can see at least a mile ahead of me.

I glance at the passenger side mirror, and something else catches my eye outside the window. The window is down, so it's not a reflection. It's a pair of cat like eyes looking at me. What the hell? I'm doing 67 mph, nearly 8 feet above the ground in that truck cab, and a dark humanoid shape with eyes that reflect like a cat's is running along side my truck and just staring at me through the open window.

Eyes back to the road, I push harder on the gas pedal, but the truck won't go any faster. I look over again, and it's still right beside me, and turns it's head to look at me as I look at it. This went on for about a mile. I wasn't afraid, didn't feel threatened, just kinda stunned and trying to process what I was seeing. It finally seemed to just turn away and run off into the darkness away from the highway.

I drove that same route 5 nights a week the rest of the summer and never saw it again.