Human player/ scoring

[Em.Er.Go.]

I know that up until the last 30 seconds of the game period, you feed balls through the little slot...and within the last 30 seconds the human player can throw the balls onto the field. So, my question is, during this 30 second period, can human players throw all the way across the field and into the goals? Although this is probably pretty difficult, unless heavily practiced, would that count as valid points?