I watched a movie review programme early 90's in the UK, (ch4, Johnny Vaughan hosted). Film appeared to be about a guy who was acting in a film as a cop (he may have been just an extra) however, he could not break out of the role and pretended to be the cop and went about killing people in the real world, it looked great and got a good write up but I have never heard or seen anything about it since. Please help! It may have been canadian? Probably american?