Ryan Woodruff, Lynchburg YMCA
We started this set with about 40 minutes left in practice:

We started doing 50s fast from a dive. I wasn’t sure how many we would do. Just when I thought their enthusiasm (and speed) was starting to wane, I challenged an individual to hit a faster time to end the round for the group and start the 200 easy.
It worked better than I could have hoped. On each round, we had at least one swimmer expand their perception of their capability and get to be the hero for their teammates.