"I must not fear. Fear is the mind-killer.
Fear is the little-death that brings total obliteration.
I will face my fear.
I will permit it to pass over me and through me.
And when it has gone past I will turn the inner eye to see its path.
Where the fear has gone there will be nothing.
Only I will remain."

This is something I've run into a number of times before, although only in a car, not on the bike. What I do is focus on just one thing that I can control: getting myself safely off the freeway and parked on a surface street. I don't concern myself with what is making me freak out, or what I'm going to do after I'm stopped - the only thing that matters is stopping somewhere safe, and that doing so is totally within my abilities and control. When this kind of thing happens to me there are a whole lot of other problems (real and unreal) that are fighting to take over, but I am able to focus so long as it's only on one thing.
After the first time through I've always been able to do this, and I don't think there's any reason that it would be different on the bike than in the car. In fact, being on the motorcycle makes things a lot better, which is one reason I ride whenever possible, particularly when it's dark and raining. At least for me being enclosed in a box makes everything way worse.
Don't let assholes get you down. Everybody's got problems in life, but most of us don't feel a need to rip on other people about them.
You might have been hyperventilating as well which can induce panic attacks and make them worse. My advice to you would be as soon as you start to feel even a bit stressed when riding do this: remind yourself to breath!
It hit after I'd come off the Bay Bridge, and that portion of mad merging traffic when all cars verge towards 101 southbound.
Had all that before but only after smoking some serious Chronic after not smoking for years!
BTW, this seems like a very serious issue, one which may not be resolved with platitudes and smart ass cracks.
I get nervous in some circumstances, and I know that IS the problem.
But I have been in a thousand like it, so I am not worried about managing my fear.
If you suffer badly from panic attacks, you might want to seek professional help before you freak out again.
i think that anyone riding a nighthawk 250 over the bay bridge would have a panic attack.
Had all that before but only after smoking some serious Chronic after not smoking for years!