Hi has anybody seen on You Tube the claims of this girl and her dad who built this self propelled metal detector on one of those remote control portable vacuum cleaner bodies? They claim to have found thousands of old coins from the 1300's to present day..She says when the detector detects a signal,it drop a small ball on the spot and keeps going.then she just simply digs under the balls..Do you believe this is possible or is this one of those staged videos? to see fot yourself go to You Tube and key in" decima metal detector" in the search engine.. lets me know what you think