1) Ask him to stand neutral, feet even. Place your hand on his chest. Then push him as hard as you physically can. If he moves, and not you, leave. I mean no movement, he should be able to stand there and smile at you
If I experienced this I'd be a convert too!
I find it very hard to imagine.
I've not seen video of anyone actually doing this without a stooge. I'd like to feel it. Genuinely.
Not £100 of I'd like to feel it ... but I'd certainly be willing to spend money afterwards