Retrace your steps, kiddo. Assuming you didn't dream it up, it ought to be here somewhere.

[Seriously, there's not too many places to hide something that big in this armpit of a room. A shovel though...what, were you dreaming of digging your own grave, Steve?

That sounds more like something Dazai would do.]

But I doubt it, since I didn't see one, and it sounds like no one else did either.