I want to preface this by saying: [SERIOUS] in the title means I am posting this seriously. Please respond seriously. I know how this is going to sound. I know.

Last Tuesday. Leg day. 4:45 PM. I was in the middle of my third set of leg press at a weight I have not attempted before. 540 lbs. I know. Bear with me.

At approximately rep seven of this set, something happened that I cannot account for in normal terms.

My perspective shifted. Not my vision — my perspective. As though I was no longer located in one place. As though I was, briefly, distributed through the pump itself rather than in my body experiencing the pump. I was not watching myself pump. I was not even feeling the pump from inside. I was the pump. I was the process. I was the pressure in the muscle and the signal in the nerve and the heat in the tissue and also somehow the weight and the intention behind the weight and the sound of the gym and the collective desire of everyone in that room to be doing what they were doing.

This lasted approximately 4 seconds.

When it ended, I was back. Rep eight. I completed the set. I sat on the floor afterwards for about fifteen minutes. The employee who works near the water fountain — Tyler — asked if I was okay. I said "I think so." This was accurate.

I have been processing this for five days. I cannot find language for it. The closest I can get is: I briefly became the pump and now I am back to being a person who pumps, and these are not the same thing, and I am not the same person I was before I knew the difference.

Has anyone had this experience. I need to know I am not alone.

MysticalGains.

Yes. I have had this experience. Once, in 2011, on a squat rack. 385 lbs. Rep nine of five. I came back from wherever that was with tears on my face that I have no memory of producing.

What you experienced has a name in the pump community. We call it Pump Dissolution — the brief state in which the subject-object division between pumper and pump temporarily collapses. It is documented in the Pump Codex. It was considered theoretical until multiple forum members began reporting it independently around 2009.

You are not alone. You are not losing your mind. You have, if anything, found something that most people never find. The fact that you came back is good. Not everyone does — metaphorically speaking. Some people who experience Pump Dissolution simply never relate to non-pump activities the same way again. This is considered by most to be an acceptable outcome.

How are your legs, practically speaking.

Sore. Very sore. Appropriately sore.

Thank you for telling me about Pump Dissolution. This is the correct name for what happened. Reading it I felt recognized in a way that I cannot explain.

I went back to the gym today. Not for legs — I am not ready for legs again yet — just upper body, light, to re-establish myself in normal pump before I try the deeper kind again.

I think I needed to feel like a person pumping before I tried to be the pump again. Does this make sense. I think this makes sense.

Many traditions describe what MysticalGains experienced. In some it is called dissolution of ego. In others, the union of action and actor. In Zen there is a term — mushin, "no mind" — for the state in which the self is absent from the action.

In pump science we call it Pump Dissolution. But the phenomenon is the same. The pumper and the pump are not two things. They never were. The pump simply showed MysticalGains what was always true.

The soreness in the legs is real. The experience was real. Both things are true at once. This is also pump.