"After you return home from a cruise, it’s normal to feel like you’re still at sea for a short time. You may lay down to sleep or stand in the shower and feel like the floor is moving and your body is swaying, rocking and bobbing. Within a day or so, your land legs likely will return and the symptoms will disappear. However, for a rare few returning vacationers, this persistent sensation of motion or dizziness can continue for weeks or even longer. The disorder is called mal de debarquement