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The cement is used for tiles, probably.
I was going to say it's the beginning of a Japanese horror movie about a curse and tell OP to run, but your explanation makes more sense.
Your hypothesis shouldn't be discounted.
![gif](giphy|xT8qBcYk7kuL9CvEdO)
It's where the evil teacher buried that really annoying student... :)
The other teachers call them the "hero teacher" though
It's probably that an alien that has laid an egg in the concrete, which is hatching now.
Sounds like an episode of Resident Alien.
It’s likely tile adhesive under a worn spot on the tile.
It's the Blob.
![gif](giphy|y2WVrfoLeD8yMaNxr5|downsized)
Call maintenance. Could be a sewage leak.
Were you shooting at some food?
Californy is the place you outta be...
So load up the truck and move to Beverly...
![gif](giphy|pGP4c8488ioAp9phUa)
![gif](giphy|xT5LMuzNaoJGnDZ11m)
That’s a poo if I’ve ever seen one
Is it the classroom where the music teacher gives lessons?
It's a yuck puddle. Have you seen it feed?
You've struck oil, Mr Clampett!
Go to the other end of it and give it some prune juice. That’ll help get things moving.
That's known as gunge, or gloop. Not sure which.
Floor dookie
Oh no it’s an excremental https://youtu.be/hlqjtqkoRdM
Probably a dead body
I smell a Legend being born. No, that’s shit, run
Roll a sanity check, please.
Hot mop to adhere tiles.
Sorry to break it too you but that's just a body slowly coming out of the earth
![gif](giphy|FqKjtMCOAqEUw)
The cement is used for tiles, probably.
I was going to say it's the beginning of a Japanese horror movie about a curse and tell OP to run, but your explanation makes more sense.
Your hypothesis shouldn't be discounted.
![gif](giphy|xT8qBcYk7kuL9CvEdO)
It's where the evil teacher buried that really annoying student... :)
The other teachers call them the "hero teacher" though
It's probably that an alien that has laid an egg in the concrete, which is hatching now.
Sounds like an episode of Resident Alien.
It’s likely tile adhesive under a worn spot on the tile.
It's the Blob.
![gif](giphy|y2WVrfoLeD8yMaNxr5|downsized)
Call maintenance. Could be a sewage leak.
Were you shooting at some food?
Californy is the place you outta be...
So load up the truck and move to Beverly...
![gif](giphy|pGP4c8488ioAp9phUa)
![gif](giphy|xT5LMuzNaoJGnDZ11m)
That’s a poo if I’ve ever seen one
Is it the classroom where the music teacher gives lessons?
It's a yuck puddle. Have you seen it feed?
You've struck oil, Mr Clampett!
Go to the other end of it and give it some prune juice. That’ll help get things moving.
That's known as gunge, or gloop. Not sure which.
Floor dookie
Oh no it’s an excremental https://youtu.be/hlqjtqkoRdM
Probably a dead body
I smell a Legend being born. No, that’s shit, run
Roll a sanity check, please.
Hot mop to adhere tiles.
Sorry to break it too you but that's just a body slowly coming out of the earth
![gif](giphy|FqKjtMCOAqEUw)