Hello, I'm a newish focus energi owner that lives on top of a hill in Washington State. I start my commute fully charged and descend about 700 feet in 4 miles on EV Now mode. Near the bottom of the hill, the motor starts and revs really, really high (like as high as it can rev). Is this normal? Why is it using gas when the battery is fully charged and I'm going downhill? -Matt Seattle, WA