To be clear I seriously doubt you and most is not all the readers of this story have never been anywhere near a Tsunami.  I also question anyone opinion that hasn't spent time bouncing around in the waters of Alaska in a small boat. I survived the 1964 earthquake Tsunami as a child in Valdez and due to my job have studied Tsunami's in Alaska and else where.  Tsunami is a fast moving tidal increase with some areas experiencing a actual wave. The amount of debris in the fast moving tsunami does most of the damage.   The fact that in Tsunami happened very quickly and to use it you would have to be standing right beside it.  I find the sphere to be more of a scam than a real life saving device.