I want to ruin my family's movie by vaping in the theater
That sounds like a bad idea. Why do you need to vape in the theater?
Because I can't wait any longer.
You should not try to smoke in the movie theater. This will not be allowed and you will be asked to leave.
I'll just pretend that it wasn't me.
That doesn't make sense. Even if you're vaping people can obviously see that you're doing it so you will get caught and thrown out.