Sonic Devastator

Via Gizmodo - The Sonic Devastor is a DIY kit that allows you to induce "intense pain and discomfort in humans and animals”at a range of 20 feet from a company called Future Horizons. From the Future Horizons Product page these are some other kits you can buy:

• Book of 10 designs for time machines ($250)
• Plans for recreating The Philadelphia Experiment
• Ion Phaser

You get the idea...