But a question about tempo, and the need for O'Brien to get his teams, particularly his offense, to play fast, got the head coach going. Remember, the Lions caught some teams off-guard with their "NASCAR" offense last year, a hurry-up, or no-huddle, that produced big dividends.
O'Brien began to talk about about the importance of teaching every spring.
"You start over again,'' said O'Brien, the former New England Patriots' offensive coordinator and the reigning Big Ten Coach of the Year...
"Now what we did in the offseason, we did a really good job, I thought a better job than we did last year, because last year we were new and in the offensive meetings it was just me standing up in front of the staff and teaching them the offense.
"Because nobody in that staff room, when we first got here, knew the offense. I brought it from New England. So this year, the guys on the staff felt a lot more comfortable with the offense. So now we were able to go back, study what we did last year and tweak a lot of it, tweak all of it. And so then you start over with the players again.''
Playing fast. Starting over every spring. This is clearly all part of O'Brien's coaching philosophy, a philosophy that O'Brien has developed while spending time on the staffs of several head coaches.
O'Brien was with George O'Leary at Georgia Tech. He spent time with Ralph Friedgen at Maryland. There was a fairly brief stop at Duke, where he was teamed up with Ted Roof, who would later become O'Brien's defensive coordinator at Penn State in 2012.
And there is the obvious coaching influence -- Bill Belichick. Surprisingly though, there is another Patriots coach who has helped shaped O'Brien's philosophy.
And that would be Dante Scarnecchia, New England's 65-year-old offensive line coach. Scarnecchia, who has been with New England since 1982, knows offensive line play well. He was a guard and center at California Western from 1968 to 1970.
"You're coaching Tom Brady and every year you go right back and you start from scratch and you teach these guys from the bottom up,'' - Bill O'Brien.
Starting over. Every spring.
"And I learned this in New England, I learned this from Dante Scarnecchia, who is the best line coach in the NFL,'' O'Brien said.
"And as you're doing it, you implement the changes that you make for each year. I think we've made some good changes, still with the emphasis of playing at a high tempo.''