LOL! This is not really helicopters, either, but is worth sharing:
A relatively inexperienced RAF Phantom (F4) pilot had a complete electrics failure, as if being over the North Sea at night in winter wasn't stressful enough. For whatever reason, he needed to operate the Ram Air Turbine, but he deployed the flap instead, as the levers were close together.
Of course, doing that at 420 knots made the flaps fall off the back, and the hydraulic fluid followed. Mucking around with the generators got the lights back on, and he headed for RAF Coningsby, with no brakes. Unfortunately, the hook bounced over the top of the arrester wire, so he used full afterburner to go around in a strong crosswind, but headed towards the grass instead. The pilot and navigator both ejected, leaving the machine to accelerate through 200 knots, across the airfield at ground level.
Meanwhile, the Station Commander was giving a dinner party for the local mayor in the Mess, and the guests had just come out on the steps (near the runway), in time to watch the Phantom come past on the afterburner, with two ejections. The mayor's wife was just thanking him for the firework display as it went through a ditch, lost its undercarriage and fell to bits in a field.
The Fire Section had by this time sent three (brand new) appliances after it without any hope of catching up, but they tried anyway. The first one wrote itself off in a ditch because it was going too fast, the driver of the second suddenly put the brakes on because he realised there had been an ejection and that he might run over a pilot on the runway, at which point the number three appliance smashed into the back of him.