I think it gets pretty darn ugly when a commercial of a movie starts to make a sense its own as a seperate movie
That or may be one of those FAST fucking commercials where some shit blows up everydamn nano-second, every fucking cars flip at your face, all the strippers in Las Vegas crack some sexual innuendos while being accompanied by "The Rock" theme song while Ben Afflec says some stupid shit like, "You ready?"
is a sure sign of a movie that has little or nothing to offer except some utterly pointless (see above)