From the "Aren't you a little short to be a Terminator?" school of design comes the squat Tmsuk T-34, which, while it won't cut you down at the ankles (nor is it a Soviet tank), packs a powerful net-launching mechanism that wraps opponents in a web like Spider-Man's. It's essentially a remote-controlled car that fires a net, controlled by cellphone with live video feedback (crazy advanced Japanese cellphones, mind you).
The T-34 will cost about $9,000 when it's ready to be marketed to businesses in two years — meanwhile Tmsuk will be working on a home defense version. I don't know how effective it is at incapacitating an opponent, but it sure does look annoying — check out a video of the 'bot in action by clicking Continue.