IDIOMS

step back

(rail transport, of a driver at a terminal station) to depart driving the train following the train they arrived into the station driving, so as to decrease service turnaround time.

Example: Used other than as an idiom: see step,‎ back.
  Perhaps we should step back for a second and think about solving this problem a different way.
  As a therapist sometimes you have to step back from your clients' lives.