Witnessed a pulsating green light in the sky, looked to be a plane. Was consistently blinking, when it moved straight down, about 10 miles in an instant. Object then moved left almost 10 miles in less than a second. Stayed for about 10-15 seconds, then head west at an intense speed. Watched fireworks about 20 more minutes. Object appeared tracking back to the original position east at an extreme speed. Light still consistently pulsating, then traveled north and into clouds out of eyesight. Almost seemed to be observing fireworks.((NUFORC Note: Source of the report elects to remain anonymous; provides no contact information. PD))