BLEEP BLOOP: I just saw an aircraft with callsign #UAL716 (ICAO code #A5C694) flying at 312 kt at altitude 8800 feet MSL at coordinates 34.3018,-118.5047.

That's, like, super fast.

https://globe.adsbexchange.com/?icao=a5c694
https://www.openstreetmap.org/?mlat=34.3018&mlon=-118.5047#map=15/34.3018/-118.5047