TTX or tetrodotoxin, is a muscle paralytic extracted from the puffer fish that can kill in high enough doses, but in lower doses it can put someone in a zombie-like trance, as found in the ceremonies of Voudoun ( Voodoo). In Japan, the puffer fish is considered a delicacy, and it can take many years to train someone to prepare the fish, otherwise the customer may die an early death, or may appear to be dead. TTX, is 1200 more toxic than cyanide.
Title translated from Spanish to English is 'Open Their Eyes'.