Again, title says all. It doesn't have to be an entire episode, it can be a scene roughly the same length as most of kyrospawn's uploaded excerpts from the show. What are your personal best and worst moments in FiM? Those tiny little scenes that struck you in both positive and negative ways.
For me, it's both a best and worst moment, and it's pretty clichéd, per se. It's the best because it completely turned the character over and really defined that other side of her, and it's the worst because it was relatively unexpected and it has that chance become a one-off instance, meaning we might only see this from her once and only once. That moment would have to be Fluttershy's "Flutterrage" incident.
Now then...what are your personal Best and Worst? Anyone?