High quality version available (on YouTube) - Dan Hsiao

Smart! - AJ Batac

cool stuff. - Alan Le

Now refresh the page :) - Andrew Smith

Whiteboard prototyping FTW! - Hao Chen

Is it just me or is the most impressive thing about this video is their ability to write in straight lines without a rule? - Mark Trapp

seeing stuff like that always gets me motivated to draw wire frames. - Adam Helweh

They filmed themselves slowly erasing it, then ran it backwards. Makes them look extremely steady-handed. - Dylan Parker

Dan, why do I get the feeling you wear that shirt a lot? ;) - Christopher Chung

I would definitely need a rule for that!! - Alex Sauceda

Really well done, guys - Christopher Sacca

Very cool!! Great work! - Karen Padham Taylor

Fantastic. I bet that took more than 5 minutes to make though. :) - Mike Cassidy

Is that how you guys do all your UI mockups? - Brian Johns

I'm going to have to talk to my UI guys. They're too slow. - Ryan Kuder

Bubble... Because I love it :) - Ross Miller

+ the music is really nice - alexxandra

LOL, who doesn't have a whiteboard these days? - Zachary TG