^^^ Ten seconds is pretty quick, obviously trained the ear very well to pick at exactly what speed and direction the beat is heading out at.

Spose that's the art after all, being able to read exactly where the track is headed after comparing the second beat to the first. Now I'd love to be able to do just that, unfortunately that's where the practice makes perfect thigy comes into effect. It can be done though, and respects to those of you who can read everything in that short space of time.