Today riding back home from work, I almost crashed...I got a tank slapper or speed wobble as I like to say it. This has NEVER happened to me! It scared me like no other. It appeared out of absolutely no where and I have no clue how I even managed to save it. My wrists are killing me right now and I don't want to hop back on until I figure out how to prevent this problem or find out the cause. I was doing 65-70ish with the flow of traffic on the freeway when all the sudden, I got the death wobble... Seriously, I hope this is not normal! Someone please help meeeee!

 

Sounds scary! Mine has never done it either, well it has but not so much that it hurt my wrists..
I know f2's aren't prone to tank slappers so something’s wrong, first thing I would check for is play in the steering head bearings.

 

Jeez that sounds freaky. Good job saving it.
+1 on the steering head bearings.
I'd also check the wheel bearings. If that all looks good then the only things I can really think of would either be that you had a belt shift in your tire. If they're older this is a possibility or perhaps you have a crack somewhere in your frame or steering head. It could be tire balance also like of you through a wheel weight but I dont think it's as much and issue with bike as it is with cars.
I'm more familiar with autos when it comes to vibration but 65-70 is the magic number for bad vibration from either unbalanced tires or shifted steel belts in your tire so that's why I mention to check those out. How did it feel after you slowed below say 60?

 

The vibration did come around 65-70mph. I grabbed the tank with my knees and let off the throttle. Luckily, I read about this problem a week before on how to save yourself from a death wobble! How lucky was that?

Anyhow, my front tire at that time was bald to the max. I also found out that the front tire was a tad bit bigger than stock (120/70/zr17). I replaced the front tire with stock (120/60/ZR17). I haven't had that problem occur again...well, not yet