While driving my 2014 nissan juke it went from 70 to 20 on the interstate and i was almost ran over by large trucks that were unable to stop. this has happened multiple times. while driving to work this time, it dropped in speed again and the rpms went over 6 but the car would not move. i push the gas to the floor and nothing happens. i am afraid to drive my car home from work due to impending death concerns.