I Was staring at a very clear night sky over the Caribbean when overhead I saw what appeared to be a satellite, I see them very often. This object started moving in a straight path overhead, but then made three radical changes in a north northwest direction while moving at the same incredible speed.To my knowledge, no jet can make those manuevers and satellites must travel a fixed path in orbit. The entire event lasted around 5 seconds. No weird lights, just what looked like a brighter, larger than normal satellite making a crazy pattern in the sky unlike anything should be able to do physically.