Let's just say 30 of your closest friends assemble for your surprise birthday party at a remote cabin and you find out about it.
Do you:
(a) tell a few of them you know and laugh into your grog,
(b) stubbornly refuse to go along with the pretext until they are forced to admit it, or
(c) decide to scare them by shooting a shotgun round into the air?
If you answered (c), be sure of your footing while your finger is still on that trigger
or else your clumsy ass might send 7 friends to the hospital.