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From Skylanders Spyros Adventure, irrelevant self insertive natter:
" Practically a trope in and of itself, plasma weapons are almost always depicted as producing ludicrous glowy puffballs (often green) that somehow avoid mixing into the air, sometimes hand waved as magically autogenerated magnetic containment."
You know, I think there might be enough Plasma Cannons in fiction to make it a trope on its own.
In "The Return of the Six Million Dollar Man and the Bionic Woman," the new bionic kid on the block has a frickin' laser beam in his right eye. This can somehow magically be set to stun. Should this be put in "Did Not Do the Research," or a page where "X Does Not Work That Way?"
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How well does it match the trope?