I was invited to attend a "cattle call" type interview at mid-level hotel ballroom. After telling the audience about the company and position, the host asked who wanted a position. At that point, what they are really looking for is go-getters to get up and get in line - literally, it took all of us about 60 seconds to "get it", but eventually everyone got up and got in a big line. As you worked your way to the front, you were asked to give a 30 second commercial of yourself, if you pass this test, they invite you to another room to talk to two company recruiters, if you pass this test, they schedule an interview at a later time with two other recruiters. At the call back interview, they ask you to bring your grades, and all other proof of acheivement. This is as far as I decided to go. It was obvious that they are looking to see how aggressive you are, without being offensive and pushy. If, in the ballroom, you can't get their attention in 30 seconds, the assumption is, you won't be able to get a docs attention either.