No one will think you're insane unless you propose it like you are.
You need to introduce it in the way we see it: a typical concept, scientifically proven, experienced by you and "enjoyed and used by thousands of people world wide", etc.
Not just explain what it is in general and move on to induction techniques.
And if anyone even asks a single question along the lines of "do you really believe in this?", you just raise an eyebrow and point out that this isn't even related to magic or any such, it's a usual concept with scientific research behind it.

Not the most open-minded explanation but it will get rid of any annoyance from those that follow science as a god and think some things are impossible.