The riders then returned to compete in the bullring of Madrid for the only X-Fighters event of 2004. Having a major impact on the pace of progression in the sport that year that the back flip had gone from what most people didn't think was possible to an almost standard feature in most riders runs. Riders were not only performing back flips with ease, they were laying down back flip combinations. Joining the event was a new face on the Red Bull X-Fighters scene, the well-known Travis Pastrana. It saw him and Adams stage the first of their head-to-head battles, going all in a battle against each other and pulling off spectacular 360's in front of huge crowds. Pastrana took first and Adams second. Ronnie Renner did his first competitive backflip in Madrid that year. The following year, after continuous success in Spain, X-Fighters staged its first event outside of Europe. Bringing the riders in FMX to compete at the biggest bullring on the planet, the Plaza de Toros México in Mexico City. The growing popularity of the sport was proved by the capacity crowd of over 40,000 fans. Once again the riders proved why FMX was becoming one of the most incredible spectator sports in the world by putting on another massive watched competition that was eventually won by Ronnie Renner. After Mexico, Madrid hosted yet another event, which Nate Adams won. Lastly, in 2006, Mexico City and Madrid were to repeat the following year and host the last two events before the World Tour format began.