alight upon apprehend arsy-varsiness ball up bite the dust blow down blow over blunder blunder upon blur blur distinctions bollix up bow bowl down bowl over break up breakdown bring down bulldog bump into capsize careen career cast down catch on chance upon chop down clutter collapse come a cropper come across come down come on come up against come upon comedown comprehend confound confuse crash cropper crumble crumble to dust culbute cut down dash down deck deflation descend dig discover serendipitously disintegrate dive down downfall drop dump encounter fall fall down fall flat fall headlong fall in with fall over fall prostrate fall to pieces falter farrago fell fetch down fidget flip out floor flop flounce flounder flutter forced landing foul up freak out on fumble garble get a cropper get high on glow go down go pitapat go to pieces go under ground grovel happen upon hash have enough have the fidgets have the shakes header heave helter-skelter hew down higgledy-piggledy hit upon hobbyhorse hodgepodge hysteron proteron jerk jumble jumble together keel over knock down labor lay level lay low lay out level lick the dust light upon list litter lose lose out lose the day lurch make heavy weather mash meet up with meet with mess mishmash mix mix up mow down muck up muddle nose dive overlook distinctions palpitate pant perceive pi pitch pitch and plunge pitch and toss play hob with plunge pound pratfall precipitate prostrate pull down quake quaver quiver rase raze rear reel riffle rock roll rummage run across run into run up against say uncle scend scramble screw up see the light seethe send headlong shake shiver shuffle slip slump smash snafu snarl up spill sprawl spread-eagle squirm stagger struggle stumble stumble on stumble upon succumb supinate sway swell swell with emotion swing tailspin take a fall take a flop take a header take a pratfall take a spill take down take the count thrash about thrill thrill to throb throw throw down tilt tingle tingle with excitement topple topple down topple over topsy-turviness topsy-turvydom toss toss and tumble toss and turn totter tremble trip tumble on tumble to turmoil turn on to turn turtle twist and turn twitch twitter understand unholy mess upset volutation wallop wallow welter whack down wiggle wise up wriggle writhe yaw