stun surprise startle astonish astound dumbfound stupefy flabbergast shock bewilder nonplus stagger floor daze shake disconcert throw unnerve discompose unsettle ambush catch unawares catch napping catch on the hop burst in on creep up on take unawares catch out catch red-handed catch off guard catch in the act ambuscade waylay bushwhack wrong-foot lie in wait catch someone with their trousers down sneak up on catch someone with their pants down pounce jump attack jump on leap leap on mug spring on strike swoop swoop on bound bound at dart dash dive dive at drop catch discover detect expose find unmask encounter come upon come across find out light on stumble on stumble upon overtake hit befall engulf overwhelm overcome overhaul overpower betide consume envelop swamp whelm assail happen outdo More