pounce upon (?.)
- ambush
- appear unexpectedly
- assail
- assault
- astonish
- attack
- be unexpected
- blitz
- bob up
- bounce
- bound
- buck
- buckjump
- bushwhack
- capriole
- catch at
- catch off-guard
- catch unawares
- clear
- come at
- come down on
- come from behind
- come unawares
- come upon
- come upon unexpectedly
- crack down on
- creep up on
- curvet
- descend on
- descend upon
- dive
- do the unexpected
- drop
- drop in on
- fall
- fall on
- fall upon
- fasten upon
- flash upon one
- gang up on
- go at
- go for
- harry
- have at
- hippety-hop
- hit
- hit like lightning
- hop
- hurdle
- jump
- jump at
- jump over
- land on
- lay at
- lay hands on
- lay into
- leap
- leap over
- leapfrog
- light into
- mug
- negotiate
- nose-dive
- overjump
- overleap
- overskip
- parachute
- pitch
- pitch into
- plop
- plummet
- plump
- plunge
- plunk
- pop up
- pounce
- pounce on
- pound
- pull up short
- sail into
- scramble for
- seize on
- set on
- set upon
- ski jump
- skin-dive
- skip
- sky-dive
- snap at
- snatch at
- sound
- spring
- spring a surprise
- spring upon
- start
- start aside
- start up
- steeplechase
- stoop
- strike
- surprise
- swoop
- swoop down
- swoop down on
- swoop down upon
- take a header
- take by surprise
- take short
- take the offensive
- take unawares
- turn up
- updive
- upleap
- upspring
- vault
- wade into
