Ann Arbor -- Donning glasses and a headset, Michigan coach Jim Harbaugh peered out at the 400 or so fans who came out to the students-only practice and welcomed them to the submarine.
First and foremost, he had rules.
"We don't want anyone recording our practice," Harbaugh said. "Nobody will be recording Utah's practice tonight, and a video of us would give them an advantage."
Even with 200 students gathered on the north end-zone track and the other half in the stands, fans were being constantly monitored by ushers strategically placed throughout the stadium. Per Harbaugh's orders, cell phones weren't allowed and ushers escorted out students who flashed their phones.