Add this to the list of interesting things spotted on BART.
A BART rider on Wednesday tweeted a photo of dentures resting on a seat inside a train as it was making its way toward San Francisco International Airport.
"@SFBART clean up on aisle 5," Mike Euglow tweeted. "Do you have a lost and found?"
BART responded to Euglow's tweet, writing, "Our end-of-line cleaner should intercept this."