Pagination.. using multiple segment variables

[eluser]Drayen[/eluser]
Hey guys, kind of a dumb question here.

Three types of fruit:

Orange,Cherry,Apple

mysite.com/cherry/5

That's how the uri segments would set up, so everything works fine

but how would I program the controller to display ALL types of fruit?

mysite.com/all/5

would not return any results, so is there a way to do an if statement where if the uri segment equals something specific it does something, or is there an easy way to automate this? Obviously the way I have it now, it uses the uri segment variable to access the database, but if there's no variable there it will break the pagination.

Thanks for any help, sorry If I worded this poorly.