A fun thing to do if you're remotely mathematical/logical in nature is to calculate how long it would take a single column of 3 mil people, walking 20 abreast, to pass a single point, just to see how long it would take to enter (not even exit) the parted Red Sea... Assume they walked 3 mph (a fast pace), and walked a distance of 3 ft apart (crowded).

Thats the time needed for the rear of the column to get to the starting point, not even including the time needed to cross the channel....

That was one long night!!!