We called the Giselle, Act II arabesque-hop sequence "the cow step." Looked like grazing? Time to use your imagination.
Wow. Thank you for mentioning this. I'd almost forgotten that scene even existed, and it's really quite beautiful.
And now for my answer... Nutcracker. There always seems to be the most opportunity for corps in the Nutcracker, and the snow scene is perhaps my favorite piece of all time.