Thanks for the replies, Gents.
No that didn't happen to me, the rumour is one youg examiner is giving all sort of strange scenarios... some of them interesting, btw.
I htink I also would open the windows and make a decision, but certainly I wouldn't start by shouting "Evacuate, evacuate" on the PA...
The question is: is there any risk of fire?
I really don't think so.
Certainly the aft doors are to remain closed, as the chutes would be pretty vertical due to the attitude.
(I'd like to see the A380's slide in this situation...
)