What's your fave WWDITS moment that you wish became a running gag or recurring moment?

Every now and then someone brings this up, so I'm reminded of Nandor's fire-generation special power, which was only in the first episode. This is sometimes called pyrokinesis. It does NOT conclusively ever get used again! But he gets to go to space, right? Several times I've brought it up, and people don't believe me until they rewatch that "pilot".

In contrast, Nadja gets to use her sonic scream shatter multiple times.

I wonder if it was just forgotten about, or what...

Anyway, what's yours?