IT'S ALIVE :)
"OK - it's (the ER50) running with two Caps and is bubbling away! Hooray! :o)
I Already had a reaction in one of my knees that's been bothering me (slightly posteriorly rotated Tibia bone). It feels like I just had it adjusted at the chiropractor - but better. Held it above the open end of the pipe and cupped my hands around the pipe to let the gas go into the back of my knee/leg for about 10 minutes.
I've now got less pain with movement. About 1/2 hour later, it felt good walking up the stairs and when I got to the top, the knee joint "cracked" once as I stopped walking. Then as I pivoted while starting to walk, it "cracked" twice and it feels very relaxed - and different in a good way - like the joint just released a bunch of tension.
This is consonant with your musings about hydration and muscular relaxation that occurs.
Great stuff! :o)"