I used to love this programme. I think when I was 12 or 13 I went to the Gamesmaster Live! event in Birmingham NEC. It was cool trying out new games before release and picking up a few cheap ones for my Atari ST from the various mail order companies that set up shop there.
A mate and I were in the audience on one of the episodes when Dexter Fletcher was doing it. Although to be honest, it ruins the illusion when you see what actually happens behind the scenes on the show.