  In this paper, we use a science fiction theme (i.e. the iconic lightsaber
from the Star Wars universe) as a pedagogical tool to introduce aspects of
nonlinear electrodynamics due to the quantum vacuum to an audience with an
undergraduate physics background. In particular, we focus on one major problem
with lightsabers that is commonly invoked as an argument to dismiss them as
unrealistic: light blades are not solid and thus cannot be used in a duel as
normal swords would. Using techniques coming from ultra intense laser science,
we show that for high enough laser intensities, two lightsaber blades can
`feel' solid to each other. We argue that this aspect of lightsabers is not
impossible due to limitations of the laws of physics, but is very implausible
due to the high intensities and energy needed for their operation.
