Lightning is a beautiful but dangerous beast: While we're pretty good at observing it from the ground -- and occasionally, being struck by it -- there's still some mystery about how the electrical discharges in the upper layers of our atmosphere actually work. The names given to these discharges (such as red sprites, pixies, elves) sound like the musings of a Dungeons & Dragons zealot rather than legitimate scientific phenomena. But at long last, scientists have been able to study images and video of one these elusive happenings -- called blue jets -- and the results are as spellbinding as lightning itself.