There's a few ways you can go about a sack celebration. In this day and age of football, there's everything from fake roping a calf to rolling around on the ground like a rabid dog.
Which makes San Francisco's Aldon Smith such a breath of fresh air. No dramatic scenes acted out. No screaming and yelling. Just taking down the quarterback, and then sprinting to the sideline to let the special teams come on the field and take care of their business. That's professionalism.
So it's nice to see someone pull a Barry Sanders when it comes to celebrating a good football play. If you recall, Barry Sanders, who was one of the greatest running backs of all time, never once spiked the ball when he got into the end zone. There's something classy about this. While i'm not totally against the hooting and hollering after a big play, but when you're reminded that players actually CAN just run off the field without telling everyone how great they are, it looks pretty good, too.
And at the end of the day, is much more memorable than all the waving of arms and fist pumps.