The Game Show scenario - as proposed by Keelboots:
1) Auditions and Matt is told by Derren :- Hi again Matt , yes I do remember signing your programme at my stage show so obviously you know the score.
Over the next 30 days you'll be put in a series of tests and if you pass them all you'll win the prize - a deposit on a new home !!!
We'll tell when somethings coming up by leaving a Jack in the Box on your doorstep.
I may also call on you at any time of the day or night with instructions.
The final messages will come from members of my team driving taxis , they'll lead you into some of the scenarios.
Good luck and I hope you pass the test.
Eminently believable but somewhat counter to the disclaimer free events that Derren would have us believe happened.