Re: Give us the method details!
"Hi, this is Barry from the Twitter IT department ( / development team / whatever). We're testing a new system and I'd like to get you to try it out."
"Umm. OK then"
"Yeah, just go to http://phishing.site and log in as normal. If you can test it out for a few days and then send us any feedback, that'd be great"
"Will do. Thanks"