I watched a film about two years ago on C5 and it was about some people who went to a mansion and it turned into a murder mystery.
firstly some of the people who went up to the front door has statues dropped from above on them but they missed.
then someone was murdered and the main room could revolve so you'd go out the room and then the room would turn round and then you go back in and it looks like the same room but all the people are gone.
the only other thing i can remember is at the end there's a person who takes some masks off which made him/her look like another person.
has anyone seen this film and if so do you know the title of it?
I think you are talking about Murder By Death. It had an all-star cast including Peter Sellers, Maggie Smith, Peter Falk and David Niven. It was about a group of detectives invited to a mansion. Have a look at it on the IMDB. Hope it helps.
This sounds like "Murder by Death". It was a comedy with David Niven and Peter Falk (among others), where some famous detectives are invited to a large house and have to find a murderer. The detectives are based on characters like Mike Hammer and Miss Marple. There are a few more details at http://www.film-criticism.com/murderbydeath.html