challenging… agreed!
unless I got a cold or a hangover (or both), I find it a rather challenging too… just happen to like the bubbly too much. Had only two flights in last three years, where I went sober.
Tried again the other day on SAS PE from Asia to Europe, but not a chance in the world. The helpful stewardess even insisted on leaving the bottle, when my neighbour (met on the plane) answered he would love a another glass for his meal. Seriously!