In the late 30's my Granddad delivered milk in my hometown of Lodi, Ca. His route covered quite a bit of the delta farmland west of town. He was by no mean's a believer in little green Martians or ufo's BUT one morning on his route around 4 am, he saw what he described as this ball of light dropping straight down out of the sky,stopped what he guessed was about 40 feet off the ground,accelerated to the south at a high rate of speed until he could barely see it,came back and followed his delivery truck for about a mile and a half then abruptly turned 90 degrees and at about an 80 degree upward angle in second's was out of sight..He never would say it was a ufo..All he would say was I saw something..
