Re: Pretty awesome opener IMHO. Thoughts?
Firstly, you're approaching a woman online. This is a controlled environment; the power roles are mutually understood and women are expecting to be solicited.
Secondly, your opener doesn't leave much room for conversation, keep them open ended; what do you see an ideal response to your opener being? "oh... That's funny."
Also, "I just thought you would want to know that for some reason" shows no confidence in the situation. If you REALLY wanted to use this opener I would have played it off like you knew her.
"Hey (her name) funny running into you here! What have you been up to? Lets keep this a secret okay?"
Rule Number 1: You are not a PUA.