The Great Escape easy - the last secret (possible spoilers)

[brell]

As Roger Waters put it:

Banging your head against some mad bugger's wall

. Replace

your

with

Jack's

and

some mad bugger's

with

Toybox's

8-)

I've found 8 secrets and can't find the ninth. I think I have found all the secret rooms. Are there 5 such rooms? How many of the other 4 secrets are not hinted?