10. BRIEF SUMMARY OF SIGHTING Estimated alt 2,500-3,000ft, esti- mated distance 3,000-4,000ft. Obsyr looking out open window of car. Obj estimated at 1 o'clock, followed straight path, & as near as can be estimated, a level course. No sound. No sign of exhaust smoke or contrail. Great speed indicated by rapid diminishing of size in short time duration.