a corps perdu, abruptly, bang, carelessly, dash, desperately, furiously, happen what may, hastily, head over heels, headfirst, headforemost, headlong, heedlessly, heels over head, helter-skelter, holus-bolus, hotfoot, hotheadedly, hurriedly, hurry-scurry, impulsively, like a flash, like a thunderbolt, like crazy, like mad, madly, of a sudden, on short notice, overeagerly, overenthusiastically, overzealously, plop, plump, plunk, pop, precipitantly, precipitately, precipitously, quickly, ramble-scramble, rashly, recklessly, sharp, slam-bang, slap-bang, slap, slapdash, smack, startlingly, sudden, suddenly, surprisingly, unawares, unexpectedly, wantonly, wildly, without notice, without warning