Just about everybody does an impersonation of John Madden. It's easy to nail his over the top obvious statements. The hard part is getting his grumbling voice. Frank Caliendo does one of the better impersonations I've heard.
This is not the sort of blog that's all "I post my random thoughts from my xcRAZyx life lol!" When we write we write with an audience in mind. But we often just post hilarious youtube videos.