Dr. McCoy: Go... Where are we going?
Captain Kirk: Where they went.
Dr. McCoy: Suppose they went nowhere.
Captain Kirk: Then this will be your big chance to get away from it all.
[Spock is preparing to enter the radiated warp core.]
Dr. McCoy: Are you out of your Vulcan mind? No human can tolerate the radiation that's in there!
Spock: As you are so fond of observing, doctor, I am not human.