The gunshot wounds or brutal beatings that are simply forgotten by the next scene, often to the point where the hero can beat up a dozen anonymous henchmen immediately afterwards.

(The most egregious example I saw was in the otherwise horrible Starship Poopers, I mean Troopers, where Denise Richards' character was impaled throught the shoulder with a roughly 3-4 inch diameter Bug claw, lifted up and dragged around by it, and then minutes later was literally throwing her arms around the shoulders of the male leads while smiling and laughing. Man, what painkillers they must have in the future...)

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"If this were play'd upon a stage now, I could condemn it as an improbable fiction."
Shakespeare, Twelfth Night
Illuminati's Razor-The most complicatedly evil answer is usually the most correct answer. - Fazor
"Every book is a children's book if the kid can read." - Mitch Hedberg
"Distance doesn’t matter much in space, where if you just start a thing off with the right kind of shove, sooner or later it will get where you want it to go." -Frederik Pohl, Mining the Oort