YouTube Vuvuzelas --> In every video?

I just came across a very funny thing they did in YouTube... They have added the possibility to add world cup vuvuzelas to all their videos (at least I think so cause I have not seen non without it today)

To hear the buzz that has become a hallmark of the South African World Cup 2010, you just need to click on the little soccer ball icon in your video player!

It works best when you are watching a sport video and want to make it feel like a soccer World Cup game.

Now, outside of the whole joke thing, I find it very nice from YouTube to actually add a little detail, almost minimal, but that feels so present. Good job.