Carrying on from Theo's answer. As we don't know what material the cube is - or, what equipment we have inside the cube, I would say we just cut/saw/melt our way out.
Have to dash out for a while, so a quickie:
Imagine that you are sealed inside a large cube, no light at all and slowly running out of air. How do you get out?

Paston School and Clive Baker.
Would not have known until you pointed me towards Google.![]()
Paston School and Clive Baker.
Would not have known until you pointed me towards Google.![]()

I think you messed up there frenchie - it's Paston School and Admiral Lord Nelson.

I meant to say Craig Murray, but unfortunately the bottle of Bordeaux at my right hand is slightly stronger than I thought.![]()
The latin word for feet is ped, from which we get pedal. Pediophobia is a rather curious fear of dolls - but I'm not sure where the horse comes into it. Is that the answer ?
O.K. another try, hippopotomonstrosesquipedaliophobia. A fear of long words ! Thus combining Hippo (German Flusspferd = riverhorse, and then the short form. Together with ped somewhere along the line. Is that it ?
