It's not uncommon to find high-level athletes and fighters who can consistently access this flow state, whether you call it "Mushin" or just "being in the zone." It doesn't mean they aren't focused on winning. It just means they get their conscious mind out of the way of the process of doing so.
What Lerdsilla does is more unusual. He does operate in the flow state, but he does so with playfulness, having fun and being creative. In Muay Thai, Lerdsilla and Saenchai are prime examples of this mindset. In MMA, Genki Sudo used to have a similar mindset. In BJJ, Jeff Glover would be the prime example. In western boxing, Emanuel Augustus sometimes worked in a similar state, although I don't think he was as light-hearted as Lerdsilla or Glover.
What Lerdsilla does is more unusual. He does operate in the flow state, but he does so with playfulness, having fun and being creative. In Muay Thai, Lerdsilla and Saenchai are prime examples of this mindset. In MMA, Genki Sudo used to have a similar mindset. In BJJ, Jeff Glover would be the prime example. In western boxing, Emanuel Augustus sometimes worked in a similar state, although I don't think he was as light-hearted as Lerdsilla or Glover.