Fast moving eastbound Union Pacific intermodal in Maricopa AZ with DPU

Mixed power---UP 7791 (AC45CCTE), UP 8502 (SD70ACe), and UP 4379 (SD70M) lead a short intermodal past the Amtrak station in Maricopa AZ. At the end of the train is DUP Up 8651 (SD70M).The turbulence knocked my lawnchair over and blew the hat off my head.