Hydraulic manuals for vehicles like tractors or dump trucks warn about high pressure leaks in hydraulic hoses can cause bodily injury. You should never use your hands to feel around a leaking high pressure hydraulic hose to find a small leak. High pressure hydraulic fluid leaking from a hose is so powerful it can break your skin open. An example of how powerful a fluid is under high pressure can be seen in water jets. A stream of water at high pressure can cut through wood. Imagine how easily it would cut through your hand.
