Has this ever happened to you?

One evening, I was doing some improvised meditation on a hotel room couch bed.
I darkened my mind.
I pictured a glowing red ball, and took ten deep breathes.
An glowing orange ball, and took ten more deep breathes.
And so on through the entire colors of the rainbow.
After it was all over and opened my eyes I felt an indescribable rush and was nearly knocked out.
Either way, I was refreshed.
Whaddaya think of this?

How long have you been doing this?
When i meditate, i don’t feel this euphoric rush like you described!
Tell us more!