What is "upshooting"

Usage examples of "upshooting".

The low dive that Croak took to avoid what he thought was the down-coming top, carried him beneath the bottom of the upshooting floor.

And if that growth has resembled the sudden upshooting of a mushroom, if it must fall because it is premature, it is nevertheless real and must have tremendous effect on all that follows.

Plate glass and traffic lights and upshooting rectangular masses, square-cut valleys of busy concrete, and it was all precisely ranged, as if awaiting a push, on a steep slope down to the river.