If you get good enough at playing guitar, especially acoustic, you can literally buzz. It's only really apparent when you stop that you can feel that buzz fade away.

Sex, masturbation, or finishing a hard workout/hike and relaxing with an ice cold soda.

Food coma

Teaching: That moment when someone's eyes light up and their whole facial expression changes from confusion to understanding. I love the challenge of figuring out how to reach that with each person.

Dancing or working out to my favorite songs: It feels like my body is taken over by the music, and I can keep going endlessly while everything else fades away.

Negative ions

High ?

Reaching the cloud-base with a paraglider, especially in weak-days where you really need to fight to stay in the hair and fight for every meter of altitude

Night time stream high

Reading. Writing.

The "zoomies" I get post-run

When the code finally works, the computer issues are fixed, the kitchen is cleaned.

finally beating a really tricky level/boss in a video game (but not so tough that by the time you beat it you're just over it)

Listening to music, especially while drawing and getting to reflect on how much got done in-between every song. It's one of the rare times we feel focused, even if only for minutes at a time. - Tabitha (ey/it)

When I finish doing a lot of chores or one big one!

Shikantaza meditation So smooth

Scoring a goal or winning a close sports game.

Rollercoasters.

A good ride on a bike or scooter

I mean, what constitutes a drug is kind of hazy, but I'd say damiana. It's a herb from the arid south of the U.S., and is brewed into non-alcoholic tonics, teas, and it's also a pleasant smoke. Great alternative to both cannabis and tobacco, and it's a solid tea.

The flowers are also cute.