I assume it is like playing darts, the line your foot can not cross, but you actually throw from a shorter distance as most lean forward a little.
Back in the day i was at a comp with my team, and there was 2 other players with really funny ways of throwing.
The one guy was leaning forward so much he shot standing on one leg as his other leg was sticking out back for leverage, the other guy while he was a R handed shooter, well he pulled back not to the "eye" as a normal player would but more like to his lower Left rib, and so dident really aim at all.
Mind you both actually played OK, but they was of course creamed by my team, which had one guy that later went on to be one of the top 3 players in the country, though at the time i could match the guy.
Mind you our team from the youth center, very few others from other youth centers could beat us, even if i always play like 20 % worse in competition.
Back then most of us rarely threw a 180.