The Golden hair brought on by the original transformation becomes longer and rigid most of the hair that hung loose in the Super Saiyan transformation (in the case of Goku or Gohan, because Vegeta lacks any bangs in front of his face, as does Gotenks) is now raised. The power output emitted by this form is greatly increased as well, as it doubles the strength of the regular Super Saiyan transformation. Even the gentle, polite Gohan became a hotheaded, merciless fighter after transforming, opting to torture Cell rather than kill him, despite Goku's pleas. Because of the intense emotion required to initiate the transformation, any mastery of the Full-Power Super Saiyan state, and mental stability attained therein, is negated, and the naturally remorseless nature of the Saiyan race is magnified, requiring them to remaster the personality changes. Once enough energy is acquired, the Saiyan must experience a powerful emotional upheaval, much like the Super Saiyan transformation, but to a greater extent. In order to achieve this transformation, the Saiyan must first gain a huge amount of energy (usually by training), far beyond that required for the first Super Saiyan form.