"half way out" is a correct and usable phrase in written English.
You can use it to refer to something that has been partially completed, either in progress or in terms of a result. For example, "We got the project half way out before running out of time."
As the force of gravity yanked me half way out of the aircraft, my body hit the rear‐view mirror and snapped it off.
Voro, bashful, was half way out the door and would have kept going if the director of communications hadn't pushed him back in to see it.
In Judaism, for example, a baby is considered to come to life when it's half way out of the mother's body.
He only came about half way out of his deep doze and yawned, "don't worry about 'em, it's been doing that for years".
Half-way out, three miles of beaches running along its northern shore start popping up on the horizon, and you can make out a sort of bump on one side of its mostly flat and barren terrain.
Their new album, Half Way There, came out last month.
Because of them my arms are half-way out of their sockets, since I've had to lug them – shopping for my dad – all the way from Smíchov.
The driver hit the brakes and Mrs Koren was half-way out of the door when the car blew up, destroyed by a sticky bomb similar to those which had killed several nuclear scientists in Iran in recent months.
Amid all the talk of centrifugal forces in Iraq, the Kurdish north has the greatest degree of autonomy - some would argue it is already half-way out of the door of the Iraqi state.
Half-way out the door, I mulled the question over in my mind.
Spanto was still griping about chemo in the morning when he suddenly thrust himself across the driver's seat, half-way out the window, and yelled "FUCK C.R.A.S.H.!' at the undercover gang-unit coyly lurking in the shadows of a nearby park.
