Page 4, Madison's 'formal' entrance. At least we get to see more of her this time.
A 'shock jack' is slang for an 'electroshock jacket'. The lighter stripes on Madison's sleeve act like a taser strip, to give a shock to anyone that comes in contact with them. Pretty handy to momentarily stun a would be mugger/rapist and give you a head start to run away. These strips are not meant to be offensive, and actually lose power fast after use. Maybe in the future of this world these things will be perfected to be reusable and more potent.