Turning a firearm on oneself (or a loved one in some cases of armed domestic murder-suicide) can fall into a category that experts call “impulsive”—a spontaneous response to immediate stressors, such as a romantic breakup, job loss, fight, or rejection. One landmark study of impulsive suicide attempts in Texas found that 24 percent of young people spent less than five minutes between the decision to commit suicide and the actual attempt, that 70 percent took less than an hour,

