Australian football and American one are very different. If you are from Australia and started to watch American football, you should know that there are huge differences between these two sports. The stopping and starting again in the game play may have looked odd in your eyes. The regrouping may not seem very familiar either.
You should know that when they regroup, the football players talk about what tactic to use in order to break the adverse defense. There are many types of tactics and you should know them especially if you bet on football teams. You will save a lot of money if you understand the sport you are betting instead of betting the names of the teams.