They already have something like this in real life... I've watched one of those stupid discovery channel weapon shows where the guy constantly strives on making EVERYTHING sound REALLY COOL, with his DEEP MANLY AWESOME MAN VOICE OF DOOM...
*cough*
Well, pretty much some dude invented the ability to recreate the affects of a lightning bolt and was able to make a gun like mechanism that shot the lightning out at an AWESOME SUPER 6-9 INCHES!!!
Instead of working on making it more useful, they decided to turn the gun into a brief case... (yes a brief case...) and used it in a simulation where the Feds would block off 2 doors, and the terrorists, after realizing that shit has hit the fan decide to bolt... 1 goes through a door that was being watched by a fed.. Another runs through an open door that had the SUPER AWESOME ZAPPY BRIEFCASE next to it and falls to the ground in a fashion that Leonardo Decaprio would even question...
Of course they then show those fake interviews where the head officer of the swat team sings praises to the zappy-case and then the host talks in his awesome manly awesome voice for like another 5 minutes until they move onto their next innovative idea... The I-shit!! A toilet that you can Twitter on while you do your business!!! *cough* sorry got ahead of myself there..