This is so damned scary, I can’t find the words. But I know what it could easily lead to.
http://www.youtube.com/watch?v=D6wWPwz4BAM
Good movie of its type. Some classic scenes here.
As for scariness, no, this business of new DNA elements is not scary. It is a long way from making extensions to DNA elements to making them DO anything.
Sort of like the difference between adding new letters to the English language, which is pretty trivial, and of using them to write a work of literature where the new words they make up are used to unique effect.
I love the exchange:
“Get everything ready!”
“For what?”
I`d be more afraid it turns out like The Stand.