Too much fuel
I launched from a ship and took 6000 lbs of fuel off a Victor tanker over the English Channel once. Due to fog over the whole UK it turned out the tanker and I were the only folk airborne that day, and when I was summonsed back to Mum due lack of trade, the tanker crew asked if I could take some more fuel because they had a command directive not to dump anything. When I asked how much they wanted me to take they said "about 100K lbs please!" Couldn't help them, so I asked what they were going to do. Their reply was, "We're thinking of doing a practice diversion to JFK." Quite sure they had too much fuel that day...