If the person physically nearst you...

[ABLb0y]

pick him up and use him to finish painting the wall.

 

[Irony's Acolyte]

I wouldn't notice in all likelihood. I don't know who the closest person is to me physically, so it might have actually happened and I still wouldn't be able to tell you.

If I did somehow notice I'd probably go something along the lines of: "WTF? How the hell did that happen?" I might come up with a silly quip though (or so I hope). "What are you doing? Why are you being a sponge? Silly, you are not sponge. Stop being a sponge."

Put him in some trousers, preferably in the shape of a four sided polygon formed by right angles.

Would you also make him reside within a shelter made of a fruit deep in the ocean's bowels?

 

[Divine Miss Bee]

i probably wouldn't know about it for a few days, as the person nearest me is my housemate in the other bedroom and i rarely see him as it is.

 

[Quinadin]

I wouldn't notice until I left for my doctors appointment and said bye to Mom...

Damn you for turning my mother into a sponge!

 

[TriGGeR_HaPPy]

Nothing.
I'm in my room alone, doing an assignment (well, supposedly ), so even if they did I wouldn't know about it. :S

 

[Kaymish]

wow sponges cant own property right? buy and bowel my neighbours house or something

 

[Adam28]

I don't know... call the police, I would have no clue what to do.

 

[crixus]

God damn it carl! What the fuck is wrong with you. Friday you brought a snowman to school yesterday you went nuts on crack today you turn in to a fucking sponge. What the heck man!

 

[SilentCom]

I would glance over to my right at my brother, in a comical fashion with one eyebrow raised, confused and suspicious:

Then I would look back at my computer screen and wonder if you had anything to do with it >_>

Lastly, I would probably wonder if I've lost it.