KISS!
We had an ALM on the AIC who gave a talk on helicopter swashplates. Talk about insomnia inducing. Then came the Q&A session at the end.
One of our number was able to answer every question proving what a good instructor the ALM was. Afterwards, when the FJ Nav was congratulated he confessed to having worked for W*stl*nds.
Shades of Bob Monkhouse in "I'm alright Jack" when told to strip and reassemble a Bren gun.