Viggen,
For what it's worth, I tailor the pre-flight brief to each passenger's interest/experience with a longer version for first-timers but everyone gets the following 'safety' brief whether it's flight no 1 or 1001.
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No Smoking
Emergency Exits - location and use
Survival Equipment - location and use
(Supplementary) Oxygen - location and use
Belts and Doors - location and use
Controls - don't touch 'em
Communications - when to shutup etc
Lookout - let me know if you see another aircraft
Emergencies - follow my advice
Flight Plan - general gist of what we're about to do
Comfort - are you comfortable?
Questions - speak up now or forever hold you peace etc
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Works for passengers and testing officers alike..
l_b