He is in fact a classical pianist, hence the way he plays resembles a lot of classical music interpretation, and you can definitely tell by how his fingering of playing the melodica. Not only his fingering is out of the world, his breath control and vibrato also shows how well he expresses his music. You can definitely call this as "melodica madness" :) Anyway enjoy!!
P.S. He uses Yamaha Pianica, which is the same grade as Suzuki M-37 (about $100 US). This proves further how good he is as a musician.