Someone I used to know flashed Simon's K, added 2 more K's and then flipped out with Didgeridoo Dubstep = cool 8) Flipping at 1:30 (It actually looks like it sticks to a wall upon recovery). http://www.youtube.com/watch?v=RCcA44lt-MM&hd=1 ;D
Please show me how to get my KK2 to react like that!!! That board is the slowest thing I have flown and large inputs seem to just wig it out.
The trick isn't the KK2 but the SimonK firmware in the ESCs. You can buy the ESC pre-flashed with the firmware, or do it yourself.