The hand pass or handball is probably the one thing that most obviously distinguishes Aussie Rules from most other ball sports you might have seen.  It is a pretty simple thing to describe, but quite difficult to actually do under pressure and many new players get penalised by the umpires for throwing during a match.

It is also the skill which can really get you out of a fix, with a hand pass often being the quickest and easiest way of getting the ball out of trouble before a crunching tackle.