How do I add an extra pointer to a callout shape?

[gearhead]

I'm trying to add some callouts to a presentation. I'd prefer to use one of
the bubbles with a handle that you can pull out to a point. What I need is to
be able to use the same bubble to point to two or more items.

 

[john the confused]

How about putting one callout on top of another. If you then remove the
border and add a fill colour it will look like more than one point from the
same text.