When John tried to unravel Quantum Conundrum he reported that there were several dimensions, including a heavy one, a gravity reversing one and another that slows down time. Those sit alongside (if dimensions sit or have sides) the fluffy dimension that has been shown in the previously released videos. I didn't believe a word of Walker's report of course. Why would he be traipsing around dimensions that the rest of us haven't even laid eyes on? What gives him the right?
Sadly, a new video shows that there is indeed a dimension that slows down time more effectively than Uncle Boring McDullston's slides from his annual fortnight long road trip around Milton Keynes' grid system. John probably made a lucky guess.