In case you were wondering...
In the poem L'Allegro by John Milton, published in 1645, a phrase appears which seemingly refers to the dance-like gracefulness of the goddess Mirth:
Come, and trip it as you go,
On the light fantastic toe.
The term trip in this passage means to step lightly or nimbly. The adjectives light and fantastic refer to the movement of the feet (toe, or dance step).
How cool is that!! Thanks Jeff!
~Mindy