Never in 4000+ as a navigator. Nearest to it in a Hunter T Mk 8c, with R*p K***y, from Honington; strangely enough not airborne but, on the the landing roll out when he deselected the cabin conditioning.
A most wonderful, corpulent and fashionista like Nav Flt cdr on 31 Sqn he used to baaarff on every sortie; that is courage of a different kind, especially during a war.
3P