Getting the digits

In other words: how to get her phone number quick and easy.
To tell you the truth, this is not my technique; I’ve read it in an e-book I’ve bought a long time ago.
It’s a very interesting technique, it’s doesn’t put the pressure on the woman and it gets wonderful results.
I know guys who used it one evening on about twelve women and he got that evening twelve phone numbers.
Pretty impressive!
You start with the eye contact, you look her just a bit, keep your eye contact if she confronts you with it.
Then, head to her and say:
“Hi, i think that you are amazingly beautiful and I wanted to say hi to you.”
At this moment, she will be astonished and don’t know what to think.
Then, you talk to her for about a minute and you say: “it’s been great talking to you; I have to get back to my friends now, bye”
Then, walk away.
A few steps away from her turn again and say: “do you have a phone?”
She will probably say yes, ask her to write it to you.
That’s all, a great technic that gets huge results.
I want your comment, positives or negatives