Before you start too many more new threads, all of the questions you've asked so far have been addressed in minute detail on other threads.

The quick answer to this question is that it is not at all uncommon. A guy in my guard unit just got an interview by working as a box thrower for a year.

But again, before we reinvent the wheel, take a few minutes to do a search and you'll find this question dissected in detail on a number of other threads.