There would be a little fluid in it...obviously depends on how quickly it was pouring out.
I've accidentally driven a Turbo400 about 1/4 mile with a bad hose leak (add-on ATF cooler) pouring out & making a big mess.
Fixed it, poured maybe 10 quarts of ATF back in, been fine since (happened 5 years ago).
I've since updated the hose/pipe setup so it can't happen again.