I actually did this, inadvertently, as a kid in the 1980s on my parents' four-channel television set. From what I can remember (I was quite young) it pulled the

I actually did this, inadvertently, as a kid in the 1980s on my parents' four-channel television set. From what I can remember (I was quite young) it pulled the colour towards the spot where I placed the magnet and left the rest of the image in monochrome. I vaguely remember finding it interesting the way the colours moved around but my parents were less impressed for some reason. They had it fixed though: a guy came out from the shop with a hand-held degaussing tool and it was just fine afterwards.