It was very challenging to try and get that exact 12 minutes. I found that in a funny way it was very freeing. O.K., these are your boundaries, so put everything that you have into just this box. If you do it right, you should feel the tension of it wanting to spread beyond that time frame. But it can’t.

Bruce Springsteen on his halftime set at The Super Bowl. [tx MT]

Related: The documentary “Wings for Wheels: The Making of Born to Run” is a fascinating look at the creative process that went into that record. Even if you’re not a huge fan of The Boss, it’s a really compelling film — as good a documentary on making a record as I’ve ever seen.