Ah another good idea would to be to have an emergency survival suit installed in case you do get stuck and maybe one with a whistle attached to alert people ?
A mirror that you could see yourself in when your not looking at it ,so you could for instance see the back of your head
No that was when BR station buffets did "can I haz cheezburger" in a polystyrene box which they microwaved. The cheeze would melt and alloy with the plastic box, the napkin would add structural strength. And then I would eat the crunchy bit. Crewe Station on the way to the Holyhead ferry about 1987..
After 9/11 I always thought about a base jumpers escape parachute kit in a briefcase. Or 400 metres of kevlar cord with a clip a harness and a speed brake in a case for a quick abseil.
Wow like wow 25 years engineering why have I never seen this before saying that needed a 29mm spanner today who makes any fitting on earth 29mm