straighten up

She straightens up with her book and heads off down the sidewalk.

Before she could straighten up completely, Jack yanked her out of the path of a block of snow, which crashed down right where she’d been standing.

She straightened up the room and came over to the window to close the blinds.

“It felt like coming over the top of a roller coaster and heading down — and then it straightened up immediately.”

Zheng got up and staggered around like a crab before he managed to straighten up.