I was coming back from jacksonville, florida to callahan, florida on or about june of 1951 (i remembered this encounter in 1970). i was driving alone along a deserted hwy us 1 near densmore, florida, roughly 6 miles from callahan. i was alone and there were no other vehicles in the area. i was driving a 1934 ford coupe with a small, high window in the back. as i was driving, i suddenly noticed a very bright light at a distance behind me, maybe a mile. i thought it was a truck. the second time i looked , whatever it was had moved directly over me. then i felt a tingling sensation and the hair on the back of my neck rose. in my 86 years i never had this feeling happen. i slowed the vehicle down then sped up several times. whatever it was stayed over me the entire time. while this was going on, the light from the object was similar to lightning strikes because it cast no shadows. it was almost blinding. i then decided to pull over to see what it was (i was very scared). i stopped, opened the door, and as soon as i stepped out the light vanished. i never heard any sound at all. i don't think it was a plane or helicopter, because there was no noise or wind. the tingling sensation left when the light left. i knew there was something there but there was no trace. it left a strange feeling. i didn't tell anyone about it for fear of ridicule. i'm 86 now and still remember it like it was yesterday. it's not something you forget and i wanted people to know.