It's the first half and your defense is getting owned. Guys are out of position, not staying true to their assignments reacting incorrectly to new formations, etc...
Do you grab the board and try to make all of the adjustments on the fly on the sideline?
Well, if you are Michigan defensive coordinator Greg Mattison you don't. Mattison's guys were getting punched in the mouth Saturday at Northwestern. In the first half, Northwestern put up 24 points on nearly 300 yards. Michigan's defense had not forced a single turnover.
At halftime Mattison quickly went to the board, diagnosed the problems and began outlining the corrections that needed to be made. The defensive staff then broke into position groups and coached'em up.
Mattison said the reason he likes to wait until the intermission to make adjustments like these is because it avoids confusion on the field, especially on the road.
The result. 0 points in the second half. A 42-24 win for Michigan. Nice work.