The Ion Propulsion System - What the... #!$@*!! - NaturPhilosophie
"That's Star Trek stuff!" ... is pretty much the bemused reaction you'll get if you allow yourself to answer casual questions about science over a drink with a non-physicist. AB-SO-LUTE disbelief. Your fault! Shouldn't have gone there... Pretend you didn't hear the question... Especially if the answer is ion propulsion !