dpkirchner was right, I did mention tapping people on the shoulder to get their attention. However I thought about it and I could only remember doing it once; the rest of the time, being in front of them was enough. So I just updated the article and removed the "tapping people on the shoulder" part, if you can't find it

"Then, I would approach them, wave or tap them on the shoulder to get their attention, and then give them my opening line."