Anarchist Encyclopedia: Impulsive
IMPULSIVE adj. Giving or producing impetus (for example: the impulsive force of gunpowder.) Acting without reflection, yielding to the impressions of the moment. In general, we call impulsive those who are quick-tempered, who get worked up over trifles, who see red as soon as something impedes them, who, in discussion, will use violence in place of arguments. The opposite of the impulsive being is the level-headed being, the one who knows how, in every circumstance, to maintain their composure. […]