You strengthened yourself with each hit and explode with fiery energy.
Prerequisites: Improved Unarmed Strike, Bomb Style, base attack bonus +6 or monk level 3rd.
BENEFIT
If you are struck by a melee attack, you gain a +2 morale bonus to Strength. This ability can stack up to 3 times and lasts for a minute or until you are struck for a 4th time, if you are hit for a 4th time, the bonuses to Strength fades and you erupt with fiery energy, dealing 5d6 points of fire damage to yourself and enemies within 10 feet unless they make a Reflex save (DC 10 + half of your character level + your Strength or Dexterity modifier, whichever is higher) for half damage. In addition, your fire resistance increases to 10.