by leaps and bounds, bounding out of their rescue capsule,

Miners Defy Dire Predictions on Fitness and Spirit
By DONALD G. McNEIL Jr.
Many miners came bounding out of their rescue capsule, testimony to their diet and organization underground.

Used computer market expanding by leaps and bounds

by leaps and bounds

Rapidly, or in fast progress, as in The corn is growing by leaps and bounds, or School enrollment is increasing by leaps and bounds. This term is a redundancy, since leap and bound both mean "spring" or "jump," but the two words have been paired since Shakespeare's time and are still so used.

bound
intr.v., bound·ed, bound·ing, bounds.

1. To leap forward or upward; spring.
2. To progress by forward leaps or springs.
3. To bounce; rebound.

n.

1. A leap; a jump.
2. A rebound; a bounce.

[French bondir, to bounce, from Old French, to resound, perhaps from Vulgar Latin *bombitīre, from Latin bombitāre, to hum, from bombus, a humming sound, from Greek bombos.]