Bioluminescent Organism In My Tank?

I was looking into my tank last night with my flashlight which has a blue lense on it. I saw two tentacles sticking out of a crevace in one of my live rocks. A big snail brushed up against the tentacles and then the tentacles began flashing a bioluminescent neon blue/green light. The light flashes were very quick and bright. The tentacles appeared to be segmented all the way to their tips and every other segment illuminated in a series of quick flashes. After the light show, the snail turned around and took off. What could this thing be? Has anyone else seen these in their tanks? It was pretty awesome to see something like this in my reef tank.

 

layoff the dope dude! just kidding,i dont think ive ever heard of that before but that sounds really cool!

 

There are small bio-luminescent brittle stars, could it have been a leg of one of them?

 

Whoa - cool!! I'd like to see this!!

 

to borrow from a different thread...

I realize pics are probably not likely but it would definately be cool to see

 

too much avitar 3D! Just kidding, whatever it is, sounds frickin cool!

 

Aliens!!!

 

This isn't the small ones I am talking about, but check this out:

http://www.ecosmagazine.com/?act=view_file&file_id=EC150p28.mov

http://www.ecosmagazine.com/?act=view_file&file_id=EC150p28.pdf

 

Here is the listing from Morgan's site (Inland Aquatics Homepage)
Clams and Other Cultured Invertebrates

 

I quess it could be a brittle star but I havn't seen anything but the two tentacles sticking out of the crack in the rock.