Why does pressure increase when you kink the hose?

Everything I read on the topic of pressure, flow, and pipe size states that as pressure increases flow rate increases. A reduction in pipe size leads to a reduction in pressure and flow. Obstructions (resistance) leads to a drop in pressure and flow.

When you put your finger over the top of the hose (create an obstruction) pressure INCREASES and flow decreases. When you remove your finger flow increases and pressure decreases. This is contrary to the fact that they are directly proportional. Another example is a pressure washer forcing water out of that little opening at 3000 PSI. I assume if the opening was bigger and the hose was bigger the pressure would not be as high