Cats seems to have an amazing capacity to sneak into the most unlikely places while their unsuspecting owners aren't looking. Stowaways on aeroplanes hidden in suitcases, being trapped in cupboards for days, found between walls the list goes on. A friend told me a story about a relative who went away on holidays unaware that her cat had crawled inside the one of the bedroom drawers.
Two weeks later she returned to find the cat very dehydrated and thin but very much alive when she opened the drawer. The cat survived to live another day but it makes you wonder how many don't. Curiousity really can kill the cat.