There was a charter school for teen parents in my office building. During my lunch hour I volunteered in the daycare center there and rocked babies to sleep. I found that no matter how stressful my morning was, rocking a baby to sleep was so relaxing that that all the tension just melted away.
Sitting at the feet of my Spiritual Masters when lifted out of my mind and Ego and only being in the presence of that which is beyond time and space, beyond the body, being in the presence of Absolute Consciousness without any separation from the oneness of that which is eternal.
The way the question is posed practically assumes that relaxation requires or might require drugs and/or alcohol. There are drugs and alcohol that do not relax a person, and there are people who have never used drugs and/or alcohol. He or she cannot compare, so cannot answer you from that perspective. From the time of conception and throughout a person‘s entire life, the are theoretically untold or countless instances of relaxation, but you’re asking for an evaluation or a degree or a measurement of a particular time of being relaxed; how is someone supposed to give an accurate response to something as vague as that?
When I was about 12 years old, in a field, alone, on a cold overcast late afternoon, ice skating on a small momentary frozen-water-from-a-previous-rain-that-froze-on-top-of-the-ground quasi-pond.
That's very evocative! I've come across a miniature pond like that in a nearby meadow; managed to get my dog to cross it (safely) so I could see if he can skate. (The results were inconclusive.)