You don't work for Dr. Evil, do you man? I mean, when you come face to face with danger on a daily basis, a little humor goes a long way, especially when it comes to humongous holes... I mean really man, you could fit a watermellon in there!
So, if I travel back to 1969 and I was frozen in 1967, I could go look at my frozen self. But, if I'm still frozen in 1967, how could I have been unthawed in the 90's and traveled back to the Sixties?
*goes cross-eyed*
Oh, no, I've gone cross-eyed.