Damn.....the engineer in me is coming out......what if?.....

.......you got some sort of vacuum system that went inside the shop into the eel tank.....outside, you put your money in the slot, and this vacuum hose searched around the tank, sucked up a live eel, and delivered it out a chute.....of course, ya would also probably get a good soaking from the water it sucked up and delivered to you as well....
Hey, I'm an umemployed engineer......but somehow, I think if I designed it and came up with a patent, I'd still be poor.....

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