The aim of the game to score as many goals as possible in that time. 

Add in the onside rule, which stipulates that one player must always be in their attacking half and which leaves only two players to defend three attacking players at any given time, and the result is plenty of attacking football action and entertainment. 

Not to mention work for the goalkeepers who regularly find themselves one-on-one with their opposition, which means they're forced to punch, jump, dive, and scramble to save a never ending procession of shots. 

Further complicating the role is the rule that goalkeepers cannot leave the goalkeeping area, which leads to heart-stopping moments when the ball teeters on the edge of the area and they hope it will come across the line so they can grab it while the lurking attacking players are poised for a shot should it travel their way. 

Just three days into the event, we've seen some exceptional goalkeeping efforts, as well as some exceptional falcons.  

The Belgian keeper copped a shot to the face early in the match against Australia today, leaving the pitch with a blood nose.  

The Irish keeper, who is also the team captain, has kept up a steady stream of chatter, encouraging and guiding his team mates to solid victories.  

So solid, in fact, that he today un-accidentally stepped out the keeper's area in order to give away a penalty and bring some action down his end of the court.  

He duly saved the penalty shot-which was, coincidentally, heading for his face-with only millimetres to spare.  

Australia's own goalkeeper, Beau Tyson, only recently took on the role and has blossomed over the Street Socceroos' first few matches.  

His excitement at saving goals is infectious, with team mates and the crowd rewarding his saves-which included a game-winning save by stopping a shot with his heel in the dying moments of a match against Belgium-with huge cheers.  

Just as hearteningly, we've seen goalkeepers helping out teams who've been struggling to find the back of the net.  

The Japanese, in particular, have quickly become crowd favourites, with their football skills proving to be slightly less than their enthusiasm for-and sheer, unbridled joy at being at-the Homeless World Cup.  

At least a couple of goalkeepers have, in a touching gesture of goodwill, found themselves slightly wrong-footed to give the Japanese an open goal opportunity, with the crowd and match officials alike cheering wildly in appreciation.  

And while the idea of willingly having balls kicked at me time and again remains both terrifying and mystifying and the memories of two falcons in two days are a little too fresh, it's perhaps moments like these that show us why goalkeeping isn't so bad-even if we still have no intention of signing up for it ourselves.