I second all of the above emotions. I'd also like to suggest another fast-foot agility drill that Amy Bento calls "football weaves", which is a lateral fast-foot traveling move kind of like an ultra-fast grapevine. She has an interval built around that drill in "Hi/Lo Xtreme", doing quick-change sets of football weave right, plyo jack, football weave left, plyo jack, over and over again. Surprisingly nosebleed even though it's low impact! Make sure to change directions quickly and frequently!
A-Jock