Jason can trap you within your own mind. If this were to happen to you, you would be aware of it, but wouldn’t be able to control your body or perceive any form of stimulus from the real world, and telepathy becomes completely ineffective for breaking in or out of your mind, as does astral projection or other means of separating your soul from your physical body.

The experience of this would be like if you were trapped inside the Speed Force, with your mind altering the area around you. This might sound pleasant, and initially it probably would be, but here’s the thing about the human mind: Sooner or later, you’re going to think of something negative. 

This could be anything from a negative emotion, to a bad memory, to the existential dread of your situation. This negativity would manifest itself within your mental world, and because humans have an innate bias towards negative stimuli, it would create more and more negativity. 

Eventually, this would culminate in a true personal hell: a world that feeds on your fears and pain, altering itself on the fly to create a situation that hurts you as much as possible, which means that you will never get used to it or become numb to the negativity, because the moment you do the situation will simply change itself to accommodate.

To people on the outside, it would seem like Jason just tapped you on the forehead and you fell into a coma, and physically speaking, that’s exactly what happened. For all 

The worst thing the Red Hood can do to you isn’t to kill you or torture you. He can do something infinitely worse than death alone could ever be, and he wouldn’t have to spill a drop of your blood.