1. i was in the park with my 6 year old daughter 2. i noticed the chem train 3. thought it was two planes side by side. as it moved over head i thought it was space junk. 4. as the chem train passed over head i noticed there where two of themand metallic in colour,and they where ziz zagging around each other in a spiral formation whilst moving at incredible speed at an amazing height. 5. i was amazed that something so high could move so fast and have such a variation in movement. 6. i lost sight when it went from one horizon to the opposite horizon.