Yes; if she's down one minute she'll bob up again the next, like a cork.
But they're so silly that they're sure to bob up and stare at him after he has gone along.
As long as he kept awake, he could, and did, bob up and down.
With a rushing whizz Frank steered his bob up alongside of the other.
Then another decoy will bob up, and Blake will go after that.
They bob up ...