Though not stated in the print article, the tv news said the users, when gassing up put the gas in a rod holder instead of the fuel tank. The boat exploded when the dock attendant instructed them to disconnect the batteries and a spark when doing so ignited the gas fumes. No one killed, but hurt. I would assume the rod led to the bilge area allowing gas to fill the voids of the boat.
http://www.witn.com/content/news/3-inju ... 05923.html
http://www.witn.com/content/news/3-inju ... 05923.html