1) Place a helicopter in a height of 5000m.
2) Control the helicopter straight to the ground (until you get a realy high speed), after a while your engine stops working.
3) Restart and the engine sometimes and try to control the helicopter.
After a few seconds your helicopter will starts turning around in a very high speed (up to 6000km/h) until the game freezes.(I was unable to close the game because my computer did not react anymore).
Perhabs you need some tries until you can reproduce it.