flat out
like blue murder
head over heels
on the hurry up
full-bore
like the wind
superfast
bomb
on the wings of the wind
pedal to the metal
balls-out
lickety
breakneck
turn of foot
lickety split
lickety cut
rushing
double quick
double time
as fast as one's legs could carry one
high speed
speed of light
hyperlight
upthrust
essorant
meteor
hypervelocity
racingly
quickening
uptempo
on the rivet
superspeed
zoom
aerial lift
amain
uprush
upwhirl
hyperspeed
lightspeed
soaringly
spanking
soarable
at full tilt
cinching
at full throttle
zippingly
upsoar
midleap
topheavily
soar