A few days ago I found this video posted in a community in Google+, and I found it very interesting.
So I'm posting it here as well, for you to watch it.
It is a video of a guy playing in one take 100 most famous guitar riffs in Rock music, combined.
Ok, for my taste the video was very interesting up to 75th song or something like that. But still. He does a great job I think.
I believe it is really worth to spend a few minutes from your time in order to watch it.