And now for something really disgusting
http://www.youtube.com/watch?v=khW3nLG_xoY

This is why you should not eat fish. Eat BEEF!

You're not supposed to add lemon to fresh fish anyway. They're protesting, and rightly so.
Also, they look exactly like the worm/leech things from House of the Dead. :D

Hollywood is already chasing the movie rights - expect a Q1 2012 release.
Unless 2012 gets us all first, of course ;)

Well I'm gonna have nightmares.

Perhaps amazingly, a Youtube commenter had the intellect required to address this:

Didn't watch the video, but I'm sure that Mike the Headless Chicken was way cooler than that.

This is common with eels (as they seem to be). They tend to keep wriggling LONG after they're dead. They're not the only fish to do this either, but I think they are the most extreme example.
I've experienced the phenomenon myself once, although not with eels. My father and I went to the local harbor to buy some fresh fish directly from one of the returning fishing boats. We bought three European Flounders and brought them home. We then cut off their heads and gutted them, and left them in a bag on the kitchen table for later. Well, we quickly had to move that bag, because they kept thrashing around so much that they knocked everything else off the table, so we had to hang the bag on a doorknob. They still kept thrashing about for several hours afterward. But they tasted great :-)
Here's another guy's experience with preparing eels: http://neilcooksgrigson.blogspot.com/2009/10/next-simply-prepare-your-eels.html
No, eels just do this.

Various acids can stimulate muscles. I thought the lemon was having such an effect. But I've never heard of this happening, with or without lemons. Really strange.

My favourite YouTubular comment on that vid is the guy pointing out to all the 'N00BS' that they obviously cannot be zombie fish 'cos they have no heads.
That's the fella i want watching MY back when the zombie apocalypse comes.

"Holding a cloth, hit your eel several times very hard against a wall."
"pull the skin back – persevere here – until you have a good inch of skin eked away, then pull off like a big macabre witch stocking."
Hahaha jesus.
Not for me.
I would've been a housewife back in olden times. :P

I concur. Lock and load, comrade.
That was really bizarre, though. For a delayed reaction by the central nervous system, that is really, really extreme. (how long did it take to cut off their heads, skin and gut them?!)
Just.. Wow.