5. How Did Burke Expect To Impregniate Ripley Without Her Noticing? - Aliens (1986)

Halfway through James Cameron's seminal action/horror
Aliens, Carter J. Burke, who serves as the movie's biggest douchebag, decides that he's going to impregnate Ripley (and her daughter surrogate Newt) with a couple of aliens and sneak them past the quarantine zone, 'cause everything has gone to hell anyway and what the heck, right? Burke releases a couple of Facehuggers into Ripley's sleeping quarters, and hopes for the best. But Burke didn't think his plan through, exactly, did he? Because we all know that when a Facehugger attaches itself to a person, it's not a particularly quiet process. Not to mention the fact that Ripley is the world's greatest alien expert, given that she's actually seen what a Facehugger can do. Why would Burke try such a stupid and risky plan? The answer, of course, is that he's a complete moron, but even for him, the idea seems kind of sloppy.