In sport betting or general in gambling be it sports, casino games they are all luck dependant games but as we play we can be certain of the out. It's just like Driving a car with someone else headlights without knowing that such person might change direction while driving and immediately they changes them you a left in dark whereby furthering ahead could give you difficult time. So it is while gambling, we aren't sure and so many cases where things has changed and in sports betting anything could happen at the dying minutes where you feels that the game is over and yet something unbelievably could happen making it difficult for to go home with winning except such person bet on single game or low odds games.