Here is a fun one but, that I've heard many years ago, back in Russia (albeit as a scientific spoof!). Suddenly it turns out to be real :-)
Defense Tech: Stealth's Radioactive Secret: "Plasma aerodynamics offers tantalizing promises of improving aircraft performance. By producing a thin layer of charged particles around an aircraft you can change the behavior of the boundary layer, significantly reducing friction. The charged layer also absorbs radar, improving stealth."
and even this:
"The Russians seemed to be years ahead, even marketing a plasma stealth add-on device said to reduce radar returns by a factor of a hundred."