pell-mell

breakneck, breathtaking

headstrong, heady, hotheaded, impatient, impetuous, impulsive, madcap, reckless, unadvised

quick, rapid, speedy, swift

horseback, impromptu, makeshift, offhand, offhanded, off-the-cuff, rush, slapdash, snap, spontaneous, spur-of-the-moment

abrupt, sudden

bedraggled, befouled, begrimed, bemired, besmirched, blackened, cruddy, dingy, dirty, draggled, filthy, foul, grimy, grubby, grungy, mucky, nasty, smudged, soiled, spotted, squalid, stained, sullied, unclean, uncleanly

dowdy, frowsy (or frowzy), shaggy, slatternly, sloven, slovenly

agitatedly, confusedly, crazily, desperately, feverishly, haywire, skittishly, uncontrollably

heedlessly, hotheadedly, recklessly, wantonly

chaotically, riotously, tumultuously, turbulently

aimlessly, haphazard, haphazardly, hit-or-miss, topsy-turvy

headfirst, headily, hotheadedly, impatiently, impetuously, impulsively, recklessly, thoughtlessly

automatically, glancingly, haphazardly

impromptu, spontaneously

abruptly, suddenly

offhand, offhandedly