I used to. Wouldn't be uncommon for me to be pacing around the room wearing Cowboys gear, yelling "BIG THIRD DOWN! BIG THIRD DOWN!" on, you guessed it, third down.... or "HIT'EM" whenever a defender got near the opposing QB. I'd pause the game before a big play and do push ups. I'd turn phones off, close myself off from the world, toss a football up in the air... etc.
Used to really get into games, and it was fun sometimes.
But I'm a lot more calm and mostly just sit on my ass eating nachos. Don't really yell or anything anymore. Which is good... acting like that is kind of retarded.