She got up, came across the room and perched on the edge of his chair.

She perched her cup on the edge of the table, thinking hard.

Then she sat up and perched on the edge of her bed.

She sat, perched on the very edge of the bed.

She walked over to the bed and sat perched on the edge.

An hour later he went back and perched on the edge of the table once more.

He went in and perched himself on the edge of the local control chair.

She perched herself on the edge of the chair across the table from him.

She perched on the very edge of the wall now.

He perched on the edge of the table, watching her.