[js1138]

One should always be suspicious when the sea recedes suddenly.

One of the most unlikely-to-be-useful of the worst case scenerio survival tips is to start running if you are near a shoreline and this happens.

[Alex Murphy]

One should always be suspicious when the sea recedes suddenly.

Or when it decides to pile up unnaturally like dirt, and leave a dry path in front of you.

One should be even more suspicious when the last Israelite's feet leave the riverbed in front of you.