Coax coupled magnetron
Coax coupled YJ1530SP magnetron @~40W power output lights up a fluorescent lamp without any connection.
Magnetron setup (dead link :/ ):
http://imageshack.us/photo/my-images/...
Warning: Don't experiment with microwaves unless you know what you're doing!
Microwaves can be really dangerous, the magnetron in this video has less than 1/10 of the power of a domestic microwave magnetron.