In the encounter between Q and Gunian (in Q Who) - was the original intent that Guinan would have special powers (beyond the time sense we saw later)? There is a scene where it looks like she and Q are going to start shooting at each other with their hands?
If you watch The Color Purple,
Whoopi Goldberg does the same strange pose when a guy is about to attack her. So I think it's just a Whoopi Goldberg thing.
I loved this scene--"she's an imp"--and the whole episode, really. Lesser writers would have had Q gloating at the end. Everyone seemed slightly more intellectual in the episodes with heavy Maurice Hurley influence, and they wore that well, especially Riker.