When arguing with someone, mention a post off their blog from 6 or 7 months ago. When they express disbelief that you've read their blog, be able to quote a few posts from the beginning of their blog.
Accept high-five from bystanders.
Accept that that person is probably so freaked out that they don't talk to you again
Repeat with more than one person in the room.
Remember to apologise the next day with lots of compliments.