The concept is okay, it doesn't really make sense that the virus is triggered by 'certain words' I like that the film is set in one room and you follow what's going on on the outside the same time as the characters do, so you're just as confused as them. The acting is mediocre at best and the solution or 'cure' just isn't likely. At 22 years of age, I know what the word 'kill' means and have done for 20+ years. Someone telling me that it means 'kiss' 15 times in 30 seconds won't change that - that's not the way the brain works. The ending leaves a lot of questions unanswered, why and where did the virus originate from, how far did it spread, what's the damage done, how many people were affected, is anyone immune, did the 'cure' the doctor or Mr Mazzy find actually work, why is it only certain words and which words? It would have made more sense if the virus was spread just by 'talking' and the world had to stay silent for example. I don't know, it seems someone had an idea and nobody really asked any questions, it was just made into a film.