3 million+/- people, plus all their herds and everything they took. Since they took what they could (including what was needed to turn gold into menorahs, so we're talking tools, tents, grandma and grandpa, the sick, a stove or 50, etc.) I have to assume they had carts. They made it through the Red Sea in a day. (I think in just one night, but I'm not sure.) Do you think that's possible in mud?