He got down on the floor and looked under the bed.

They were under my bed before I moved in here.

She looked under the bed again, but he was really gone this time.

"These items were found under the bed in Room 50 just minutes ago."

I can get under the bed and wait there until he goes.

Or She lay down on the floor and got under the bed.

Then he is going to look under the bed and pull me out.

Her body was found under his bed at the hotel.

They all went into that box, which he kept under his bed.

Well, why can't you have a third person lying under the bed, never seen or heard?