• to be impulsive in one's actions
• in a crack, in a shake, like a shot
• things are coming to a crisis, things are drawing to a crisis
• things are coming to a head
• things are coming to a crisis, things are drawing to a crisis
• things are coming to a crisis, things are drawing to a crisis
• that requires some doing
• instantaneous, momentary
• at the moment, at this moment, for the moment, momentarily
• instantaneous exposure, snap, snapping, snapshot