ready steady go
- startTo set going
- raceCompetition of speed
- countdownBackward enumeration to zero
- sprintBrief maximum-speed effort
- beginTo start something
launch · starting line · whistle · gunshot · set · action · takeoff · dash · mark · starting blocks · green light · signal · runners · competition · anticipation · burst · trigger · charge
ready steady gocaught off guard
Surprised when unprepared
unprepared · not ready · unawares · flat-footed · blindsided