For the first one: any paradoxical statement will do, or any statement that would be paradoxical based on the two punishments for truth or falsity. ("I am lying." or "You will feed me to the lions." would both do).
(hide) If you want to save on bandwidth you can reduce the amount of information that shows up in your pages in the Settings. Try changing the number of games in the main page and the number of messages per page. (pauloaguia) (show all tips)