go to a random place and say: AKA BAKA!
go to a random person and say: Your message contains too few characters.
burst into a restaurant and say: I'M ON FIRE!!
go to your friend's house and say: did you know, THAT YOUR HOUSE IS ON (deep breath) FIRE AND (another deep breath) SET ME ON FIRE! (now you pant many times).
can you think of other don't...'s?