Related Clues:

• Celestial sightings
• Radar anomalies
• Arctic vehicles
• Subject of some faked photos
• Scary sightings
• Strange hoverers
• Runners' locations
• Specks of light in some home movies, purportedly
• Pies in the sky?
• Winter rides
• Coasters on snow
• Snow skimmers
• Zero-wheeled vehicles
• Runners' locales
• Sci-fi fleet