Hysterical Strength

Hysterical Strength, also sometimes referred to as Superfire, is a power up technique used by some Third Generation pyrokinetics.

Overview
Hysterical strength is a technique that allows a Third Generation pyrokinetic to utilize 100% of the full potential of their Ignition Ability, whereas only 30% is usually used. This makes the users flames much stronger than usual and have a much higher temperature. When Shinra used it, his flames turned blue due to their higher heat, and they took on a more refined claw-like shape.

During Shinra's battle against Captain Burns, he was able to achieve Hysterical Strength due the overwhelming "Pressure of Death" that he felt from having to fight an actual life-or-death battle against one of the strongest combatants the Special Fire Force has ever had. While Hysterical Strength was active, Shinra was able to knock Captain Burns back from his original position with only single kick, an exceptional accomplishment considering Burns is well known for his super-human strength and possesses an Ignition Ability that enhances his physical abilities.

Benimaru Shinmon somewhat confusingly remarks that unpowered individuals can also utilize Hysterical Strength, later cryptically calling Akitaru Obi's physical might an application of "Hysterical Strength". Whether he was speaking metaphorically or literally is unclear.

Trivia

 * This technique seems to be based on the real world phenomena of hysterical strength: a display of extreme strength by humans beyond what is believed to be normal, usually occurring when people are in life-and-death situations.
 * The aspect of Third Generations only using 30% of their full power under normal conditions may be a reference to a now-debunked theory that humans only use 30% of their brain at any time.