astraddle

He made a few turns around the room, astraddle of his chair, and ended by a grand somersault, as if his steed had dismounted him.

Set him astraddle the wooden horse with a spear shaft at either foot to teach him that a soldier's first duty is not to think.

Astraddle on Tono-Bungay, he flashed athwart the empty heavens—like a comet—rather, like a stupendous rocket!

Having careered, plunging and tugging and side-stepping, until she was astraddle of the outside trace, Jenny stopped.