Watch until its head isn't in line with a Knight, then aim and press the trigger.

"Can't he stop until my head feels a little better?"

Until my head banged hard against the ceiling, at least twenty feet above the floor.

It's funny: right up until then my head hadn't hurt a bit.

Until his head came up sharply, and he stepped back a pace.

If frightened, it may submerge until only its head or bill shows above the surface of the water.

One rung at a time, until his head poked above the carriage.

They'd play it until my head cracked like a peanut shell.

Armstrong crawled up farther until his entire head was out of the water.

No point getting up until his head stopped pounding.