Me and my bro have played through JSRF, but we haven't unlocked all the characters. One way to do this is to get a 'jet rating.'
How in god's name does one achieve a jet rating? help!
I'm afraid I have no idea whatsoever.
shareWhile I'm guessing that you've long figured this out, I'll post a link to a FAQ that IGN has up on their website. Scroll down to Chapter 10 of this FAQ and you'll find out what a Jet Ranking is and how to get it.
To quickly explain, a Jet Ranking means that you finish a level in a quick amount of time. For more in depth look, here's the link http://faqs.ign.com//articles/381/381709p1.html
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Looks like you forgot to take your anti-retard pills again.