This agility game has quickly become one of my favorites. The mirror drill has always been popular, especially with basketball coaches. However, a lot of the time the players become bored with just staying in front for 10 seconds without an objective. This past winter I was working with a semi pro basketball team and challenged them to this version. The leader/offense tries to get two feet outside of the paint before the mirror/defender can touch one foot. I time them for 10 seconds to see how many times they can achieve the 2 for 1. We then rest and switch leaders and mirrors.
It turned out to be much more competitive and players were moving much faster. I use this now with my athletes in the summer and has been a staple agility drill. Over the past couple weeks they have become much more disciplined about staying low and in a tunnel (thanks Lee Taft). It's great to see them taking the concepts and applying them to a reaction stimulus.
Here's a couple videos of one of my small groups having some fun with it this past summer.