When you abuse drugs or alcohol you'll make more accidents or dangerous situations.Our brain is very sensitive for the drugs.When we overdose drugs we'll fell strange,we'll see hallucinations,but at first we'll fell power and that we can do anything we want,but it will pass quickly.When we drink too much we'll have perceptual distortions,so you won't be able to drive a car,or bicycle.We'll have ''helicopters'' in eyes.