The sudden exit from a Shackleton (minus parachute!) through the forward escape hatch seems to be true. When I was flying in Gib/Malta based Shacks from El Adem as an occasional Airman Galley Slave (1953) it was given as a word of warning about jumping down, between the two Pilot positions, into the nose section. But in this instance the tale was that it was a Royal Navy Officer up to see Anti-Submarine work 'from the other end'! So we must be talking about the JASS and Ballykelly era? Be interesting to see if we can nail this one down.
Meteorology is a science; good meteorology is an art