Portal 2 end rooms

portal-2

I had a question about the ending:

During the end movie, before the elevator gets to the turret symphony room, there are various flashes of small rooms: turrets guarding a cube, double turrets, and one were turrets seem to be manipulating something organic. A big potato? Some kind of creature? What is it?

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Best Answer

It's most likely a potato. It's more of a joke like the rooms before.

Dare I spread the rumor mill and say it's an observer from Half Life?