After reading this I saw an application as a 'tsunami panic room' within your house. It could act as a living space, but can seal up and break away from the res

After reading this I saw an application as a 'tsunami panic room' within your house. It could act as a living space, but can seal up and break away from the rest of the structure safely in the event of a tsunami. That way you don't have to have a back yard in order to keep it handy