I remember once being at a cinema and this nameless creature masquerading as a small child was sitting behind me with its evil creator and kicking the back of my seat. So I went to get an usher; I would miss some of the film, true, but I wouldn't be able to enjoy the film with that thing kicking my seat anyway.
The usher ended up throwing the mother and her demonspawn out of the cinema after she swore at him.
Pwnage.