click the image, guard dog is a community thing that got popular and valve are just acknowledging it like they do other cool community stuff like control point
They tripled the hat drop rate when they gave out halos.i guess the drop rate has been increased
http://www.youtube.com/watch?v=izxGrUi8a24 - Round 1
http://www.youtube.com/watch?v=YCx2iRYY0Co - Round 2
I'm a bit disappointed that nobody's mentioned either of these videos yet, but, oh well.
They are hilarious.
Wanna learn to play Heavy?
http://www.youtube.com/watch?v=3fGZOW5RZdg
Go wild.
This vid is all about playing a medicless heavy. It's especially good on Dustbowl, but the tactics inside are important for anyone who wants to even hint at playing Heavy.