Other source:
Tienshinhan splits his body into four separate Tienshinhans with a total of 12 eyes. Goku gets knocked down by their first attack, but used the opportunity to find the two weaknesses in this skill: the 12 eyes are too sensitive and each Tienshinhan is only a fourth as strong as the actual Tienshinhan. Goku uses Tienshinhan's own Taiyoken against him to blind the 12 eyes, and then knocks all four Tienshinhans out of the ring for the victory.
