i think that it just popped out, when it did they had the strut disconnected from the steering knuckle, and also the swaybar removed, as they were replacing it. (i think)
When i did my cv boots, the driveshafts did not pop out!. it took a bit of convincing to get them out, and that was with the strut off the steering knuckle, tie rod off, and the shaft out of the hub. If you had the strut and the swaybar off i reckon that almost any driveshaft would fall out just because of gravity.
good luck with it.