Blurt out verb – To utter with a sudden burst of strong feeling. Tell and blurt out are semantically related. in divulge topic. In some cases you can use "Tell" instead a verb "Blurt out", when it comes to topics like gossip.
Every time you get only about 2 seconds to choose a line (neatly presented in forms of brief notions, like "tell truth" or "turn into a joke".) Fail to choose in time and the character will blurt out one of them at random.