Masochistic Blast (3.5e Maneuver)

This is not the high pressure cream filling I was talking about.

You cut yourself (dealing at least 1 point of damage) and release a high pressure shockwave of superheated blood in an explosive burst. The amount of damage you deal depends on how much damage you deal yourself. For every 1 point of damage, the cone deals 1d6 damage to all creatures in a 60 foot cone (Reflex half), up to your initiator level. Though the damage is not fire damage, creatures vulnerable to fire damage take extra damage as if it were (creatures immune or resistance to fire are not immune or resistance to this effect).

On a natural 1 on their saving throw, a creature also falls prone.

This maneuver is a supernatural ability.