No matter how outlandish, the amazing toys and gadgets in the movies always end up in the shops eventually. Consider Hollywood to be essential R&D.
The Portal Denial System from Ionatron is actually better than the weedy little laser detectors that every big-screen jewel thief has to face. It fires lasers across the hallway which in turn create a plasma stream, along which high voltage current can be sent. Believe us, this thing is scary and deadly. Just check the video.
www.youtube.com/watch?v=
Product page [Ionatron via Sci Fi Tech]
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