Woody Allen likes to do a lot of master shots. He likes to get the whole thing in one take, and so you could be going along doing a scene, and then the next to last line, all of a sudden, you stumble, and you have to go back to first base. ↗
What surprises me, what amazes me, is that it seems the military people were expecting to stumble on large quantities of gas, chemical weapons and biological weapons. ↗