Update: Mutant Plant Cut Down To Size

So, it turns out that the giant stalk is part of the rhubarb plant after all.  Upon advice from people who use terms like "gone to seed", I have cut the flowering stem off.

Giant Mutant Plants (tm) still have a long way to go for world domination if they can't defend themselves from scissors.

Creepy Giant Plants

I'm trying to figure out exactly what's going on in my garden.  I don't know what's been planted and what's a weed.  There's a patch of rhubarb in the corner of one garden behind a house... no big deal.  But today I notice this GIANT stalk shooting out of the middle of it.  It must be growing fast because the last time I looked there a few days ago, there was no such stalk.

So, I'm just throwing this out there: What the crap is this?  Is it a normal part of a rhubarb plant or (more likely) an alien lifeform looking to conquer us via our most unsuspecting living organisms... plants.

That and I find creepy giant plants to be creepy as hell.