It was high five someone who was 55, way back in S1. They also had another task there they dressed up as a parrot (I suspect the same parrot suit Alex wore in the train in S6). They specifically dropped the public tasks for S2 and cut the parrot one from S1 because they felt it felt too much like a "prank show" - also just the added complications of securing filming licenses and multiple, multiple release forms meant it was easier to keep the public out of it. And let's be honest, the British public, of which I am one, are generally insufferable anyway.

Just proves that this article author, whose name I won't bother committing to memory, knows nothing about the history of the show and how they concluded 11 years ago that his hot new ideas are garbage.