Quoting earlier mail on choosing a hack tip:

Here are the criteria I know about for choosing/designing a hack tip for the class. Please add more you know of.

   - Is fun for the class

   - Is challenging but do-able for the class, who aren't as skilled as veteran club members yet.

   - Is different from recent hacks

   - Involves all people in the square.

   - Minimized risk of injury

   - Doesn't make Ted quit - if it requires special work on his part, he must be consulted and ok things.

We'll want one hack for the patter, and one for the singer. I believe the patter hack can be more challenging, since patter can be slowed down