After third down the fourth down comes up and you are at your play screen.
Wait for the play clock to run down as far as it can and then select punt/field goal block.
After you select your play dont press anything and wait for their huddle to break.
At this time there should be about 6 seconds on the play clock.
Get the guy on the end and a little after the play clock turns 3, jump the snap and run to the punter (or if it's a field goal then dive).