I expect your question was tongue-in-cheek but asking about survival when flying in J is likely to generate a certain response from many people.

You may get more helpful information if you ask for tips on how to maximise you enjoyment of the flight or how to arrive as refreshed as possible etc.

There is quite a lot of relevant discussion on previous threads which you may find useful:

https://www.flyertalk.com/forum/brit...ps-please.html

https://www.flyertalk.com/forum/brit...leep-tips.html

https://www.flyertalk.com/forum/brit...5-cw-seat.html

Have a good trip!