Not a UFO, it must of been this:
I remember hearing about some back woods kids that were putting out traps to catch 'coons & stuff. Every once in a while they'd catch a buzzard by the leg in a trap. Then at night they'd pour gas on 'em, light 'em up & turn the bird loose. It'd reached a pretty good altitude before it crashed & burned. Redneck fireworks! The practice stopped when one unfortunate blazing buzzard landed on their father's barn.