In the mid 60s I was at Headly Court (don't ask!) along with Jimmy Dell who was the P1b (Lightning to you) test pilot. He told a story of the Farnborough show when he was doing a low fast fly past. At that time getting the burners to light together or at all was an unlikely event so he plugged both in. Both lit up and, before he could react appropriately bingo! Broke all the ATC glass and got a bit of a wigging. Those were the days.