Even though you paid £5-£10, the film was so bad you decided to leave?
I did to Indiana Jones - Kingdom of the Crystal Skull. Bloody awful.
I did come unbelieveably close to walking out o Epic Movie though.

Once, House of flying daggers.
When me and the GF first started going out she picked the film. Didn't know it was only English subtitles.
Harry potter.. I was talked into going against my better instincts.. So I left.