The 'PILOT RESPONSE' challenge is good.
Ah yes, we like to call it "PILOT RESPONSE ROULETTE". To see which switches or buttons u can push without cancelling the message, great fun! Particularly on those long Pacific flights which dont have any radio calls and datalink is doing its thing!
I also like to see how many spins of the nosewheel tiller I can get in one go. Pisses the other bloke off a bit though!
All good fun!