"After successfully navigating a mirrored maze on his hands and knees, this spectacularly dim contestant touched the crystal’s reflection instead of picking it up. He then patted himself on the back, decided that was all he was supposed to do and retreated, leaving the maze without it. Wow."Apart from the many animated gifs including the DOG from FTN, the Flextech Television Network which was on Freeview for three years from launch and home to The Crystal Maze reruns on an unending loop and ex-contestants and their relatives turning up in the comments, there's a link to this history of The Crystal Maze in outtakes in which we hear what the people in the gallery thought of the efforts of the contestants:
"Right, send in the three year old child."