Spontaneous Scholar: daquell

Since school will be starting soon, I’m trying to compile a list of the ten most useful things one can do with a mechanical pencil. Thus far, I’ve only come up with four items on the list:

1. Write with it (*sigh*)
2. Use its spring as a cannon and shoot paper clips around
3. Pop balloons
4. Carry encoded documents inside the hollow cylinder

Does anybody have any other possible uses for this multi-talented object?