BUERGER'S DISEASE
Buerger's disease is a disease you can get from smoking. It is an acute inflammation and thrombosis or clotting of arteries and veins in hands and feet which may lead to gangrene and amputation.
You can still use your hand to signal your stop but when you continue smoking, you let it destroy you until your hand that once was there will forever be gone.
Would you rather stop smoking or stop living?