What did you do last Saturday? Dress up in 80s gear to strict instructions?
Act out a murder investigation?
Cop a feel?
Scale a human pyramid?
No? Bit of a waste of a Saturday night then really.
If you haven't participated in a murder mystery party before, DO IT. Seriously good fun.
(Hint: it really isn't too obvious to be right - the murderer is exactly who you think it should be.)