The challenge to teaching in the summer is that the heroic instructor (moi) must cram four months of material into four weeks. This means that not only am I designing a class utterly from scratch (I've never taught this course before or even done it as a TA or even took it as an undergrad) but I have to come up with a way to make hours and hours of endless me entertaining as well as informative.
My students are a hard bunch to read - maybe it's a survival tactic. I have a couple who occasionally reveal their amusement or horror through a flicker of the eyebrow, and I've come to rely upon them more heavily than I think they know. Oh, they know the answers if I call on them and all of that and when I move onto an unusual or outrageous topic I can tell that I have their full and utter attention, but here's only so much you can say about President X that will elicit enthusiasm.
This has forced me to make all sorts of teaching choices I would usually avoid - I've showed a lot of film and documentary clips, played and analyzed music and disected pictures. I'm painfully (self) aware that this summer hasn't been my most effective teaching experience, but I think (hope) that having, through desperation, tried some new techniques and made them work, that I'll be that much better in the fall.
Perk #2 to not being a PhD - if I fell flat on my facethim summer, it wouldn't prevent me from being able to get a job somewhere else