John remarks that terms are misused as he discusses the wave at the beach house. But he repeatedly misuses the term tidal wave when referring to the tsunami that just hit.
John claims that the last tidal wave in the Atlantic happened in the 1800s. But the largest tidal wave occurs a few times a year at the mouth of the Bay of Fundy in Nova Scotia in the North Atlantic. It is roughly 20 feet and is basically stationary.