Train goes by with DPU Horn BLARING! + Great TRAINS in SAN TIMOTEO CANYON!

Got a cool video here,😎 Beautiful Day watching trains in San Timoteo Canyon. The interesting thing today was a Z Train going by, with a mid-train DPU's horn just going on and off blaring as it goes by! I heard the engines horn still going hours later while mechanical was taking a look at it so I don't believe a transient was riding in there, but anythings possible! DPU is "Distributed Power Unit" meaning it is remotely controlled via radio signals from the engineer at the head end of the train. Starting out, we see an Eastbound Z Train climbing Beaumont Hill thru El Casco, passing the MTUMC - Manifest from Tucson, AZ to Montclair, CA and the conductor giving a roll by. Later we fly over to Hinda a couple miles up the Canyon and get some Great views! Thanks for watching! 😎