Climbing out of Cologne one day in a BAC1-11 with the cockpit door open, at about three thousand feet there was a large bang and a ball of energy slowly left the flightdeck and made it's way down the aisle to finally disappear near the tail. The stewardess, a very pretty girl with a shortish hairstyle, unstrapped herself from her seat in the galley and came into the flightdeck "asking what was that?" not realising that her hair was now standing upright like a field of corn. Oh how we laughed!