"leap back" is a correct and usable phrase in written English.
It means to quickly move or jump backward. Example: The horse suddenly spooked and leapt back, nearly knocking over its rider.
Now they leap back to 1992.
I can Leap back, the plant thinks.
Couldn't it perhaps Leap back into that older organism?
All she needed was a pair of flippers and she could leap back into the sea.
Their mouths finally touch and they leap back in disgust with cries of arrgh!
Politicians fall in coups, only to leap back into the fray with their own parties.
Of course North is going to leap back up and say he is fine.
Apatow hadn't done standup seriously for about twenty-two years before he decided to leap back into the form.
I'd had to go weeks without swimming during radiation, and could hardly wait to leap back into water.
"I didn't leap back into life with Ben so much as inch back into it," Shirk tells Greene.
Obviously, Mr. Gore has a right to leap back into the presidential sweepstakes and take his chances.
