Observed a very fast moving light flying level 15 degrees above the horizon. craft was traveling in the wsw sky from tampa approx 240 degrees going west to approx. 265 degrees until dropped from visible sight due to distance. estimate of distance offshore from tampa "if it was in the atmosphere 30-40 miles out and 40,000 feet high " would have needed to be traveling multiple mach, example hyper-sonic mach 5-6 is guess. if it was exo atmosphere , it would have needed to be significantly faster, as it crossed the sky at a 45 degree angle going away from us, going from very visible to distant, to out of sight in 4-5 seconds.