A white light was seen until it accelerated and disappeared.The object was a bright-white light. It was very high up, and moving very quickly. I watched it zip across the sky for about 25 seconds, until it instantly accelerated as fast as 10 times it's previous speed while leaving a thin white trail, and it moved out of sight in less than a second. It was last seen traveling southbound.((NUFORC Note: Witness elects to remain totally anonymous; provides no contact information. PD))