Subject had been operating PWC when it stopped working.  Subject got PWC back to dock and secured.  Subject tried to start PWC several times before attempting to jump start it with a portable battery jump pack.  When hooking battery to the pack, there was an explosion and flames that engulfed subject.  Subject was set on fire and jumped into river to extinguish flames.  Subject suffered second degree burns to face, chest, arms and shoulders.
Seneca                        