Did anyone lose a set of fake teeth? Dentures was caught in between bus seats

Dentures was caught in between bus seats and the moment was captured by Eugene Nakamura.

He sent the photo to SGAG which posted his photo along with an old man's photo on their Facebook page. 

The photo shows the old man scratching his head as he asked, "Where did I leave my keh ki (dentures)?"

We are wondering how did it get stuck there in the first place.

Whatever it is, we hope the poor owner gets new dentures.