Lightning strikes
Nothing attracts lightning like 3 miles of wire out the back of a Canberra. I was struck off the Scillies in gin clear weather. Put one of the old Avons out and punched several dozen holes in the bomb bay doors. Made my mate lying in the nose get his ass back in Martin Baker's finest double quick I can tell you. As they say it can strike anywhere. As for the "bonding", even through kid gloves I felt it. Doesn't last forever that "bonding"!!