Safety announcement on the flight from Johannesbrug --> Gaborone:
"Once we have reached our cruising altitude you may use certain electronic devices such as CD players, hand-held calculators and electric shavers."
So now I'm left to ponder the possible uses of that trifecta of electronic devices and mull over the concept of a "hand-held" calculator. (What would a non-hand held calculator be? An adding machine? An abacus? A laptop?) These are the big questions in life.