More a general question than a blog...

As I was watching the Habs shootout against the Blues, I couldn’t help but notice that the announcer in St. Louis explained the rules of the shootout to the fans who were there. I’ve only been to one game that ended up in a shootout here in Montreal, but I didn’t notice our announcer give this explanation… Though it’s quite possible that I may have just not noticed it at the time, I was wondering if it was common practice at other arenas to do this, or if it was something done solely in St. Louis. Just curious I guess! Thanks in advance for your comments!