attack begin blast away blast off commence dive in enter on enter upon fall to get busy get cracking get going get to get with it go ahead go off half-cocked go to it head into hop to it jump off jump to it kick off launch into light into pitch in pitch into plunge plunge headlong plunge into rush into sail into send off set about set at set in set out set sail set to set to work start start in start off start out tackle take off take on turn to undertake wade into