Cool trailer: 'Safety Not Guaranteed'

What would you do if you saw this ad in the paper:

WANTED: Someone to go back in time with me. This is not a joke. P.O. Box 91 Ocean View, WA 99393. You'll get paid after we get back. Must bring your own weapons. I have only done this once before. SAFETY NOT GUARANTEED

Though I think the "bring your own weapons" clause would scare me off, it doesn't discourage characters in the new movie Safety Not...