Many puns are fleeting and transitory, devised and stated in a flash for a situation or immediate condition (see Word Plays, Puns Intended on the Internet). These kinds of puns can rarely be retold effectively, as the event that triggered them in the first place does not reappear exactly as before.<br />But some puns are enduring! These can be memorized and told over and over in different social contexts and events, each time with the same overall effects - enjoyed by the teller, and enjoyed by the appreciative audience, albeit with some groaning. Some of the enduring puns are tongue twisters, so tellers are advised to practice telling them in private so as not to miss any key words that might lessen the effects of the punch lines. Other puns are timing precise, so a miscue, or mistiming destroys the intended effect....