What was the best WordCamp session you've seen?

I'm putting together the program for WordCamp San Francisco (August 4th!) and wanted to highlight some of the best sessions from other WordCamps around the world. If you attended a session that really spoke to you, even if it wasn't from a well-known speaker, please share it here.

Q.1
Which WordCamp was it at? *

Q.2
What was the topic? *

Q.3
Who presented it? *

Q.4
Anything else you want to share or suggest?

Q.5
Who are you? *