I was calling play by play on a college summer league baseball game at the time. Noticed a fairly bright green light high in the sky to my left. (North) Lasted about three seconds. Left a green trail. Two objects. One larger than the other. Both left trails behind them. May or may not have been a cracking sound with the lights. Hard to tell with crowd noise, buzz from the lights and the PA system at the ballpark. We had a video camera running but the lights were above what the camera could pick up.
