1. Goto the part of the tutorial with bob.
2. Invite a friend, promote him, and have him boot you.
3. Make sure your friend does not abort mission.
4. Now, just keep attacking bob and you will gaing experience.
Well its a quicker way to getting to level 2.
And you can keep fighting him to at least level 3 and get ok experience.
Yet another thing i cannot say it has a good use, but others can work on how this could help them.