The human mind perceives rolling forward and does not replay backwards, and simply is not geared that way because nature does not play things backwards. Humans evolved on Earth to deal with sights and sounds around them, not with an artificial phenomena. Always nervous about being tempted by the Devil, humans as most 3rd Density intelligent species look for signs that this is occurring. Discontent to simply rely on their intuition, they want a truth test that can be applied. It's just so much easier.
Reverse speech is just the thing.
As an avenue only recently detectable, due to modern electronic playback systems which can play video and audio tapes in either direction, and at any speed, it has recently experienced a rush of attention which, we predict, will not last. In point of fact, any conversation played backwards at various speeds will sound vaguely like a recognizable speech phrase. If one expects to find a phrase, and plays speech or music backwards long enough and at different speeds, eventually some sounds will seem to emerge that bear a faint relationship to a word or two. Where reverse speech is not truly occurring, there is another phenomena in place in which people are trying to ascribe a physical medium for information that they understand intuitively. Human beings who are barely aware of their incarnated spirit, often have knowledge that they cannot ascribe to any source.