[HPsquared]

There's a cool effect where if you hold a fluorescent tube under a high voltage power line, capacitive coupling from the varying electric field causes it to light up. Some energy is continually leaking out via this route, the tube just reveals it. (Magnetic induction too)

https://youtu.be/0D50Dcvzkr4

[afandian]

You can feel it yourself if you have a piece of metal, like a bike.