The pilot side-slipped the plane to lose altitude quickly.

The pilot was side-slipping the plane to lose altitude quickly.

The pilot performed a side-slip maneuver to lose altitude quickly.

The pilot side-slipped the plane to lose altitude quickly.

He slipped down the stairs.

She slips down the stairs.

She is slipping up on her diet and eating junk food.

She is slipping down the stairs.

He often slips up when speaking in public.

He slipped up and fell on the ice.