Running Water

Above a treadmill, hanging on the ceiling, are a series of buckets containing water. The contestant has to jog on the treadmill, lift down the buckets and pour the water into a tube. This tube leads into another, so that the key is pushed upwards by the water. To destabilize the candidate, the speed of the mat varies during the test and the candidate by spilling water makes the mat more and more slippery. It is also not helped by the elastic stretched through the mat and of course just under the buckets. By not seeing the step on the sides of the mat, several candidates choose the difficulty by climbing to the end of the mat!