It is usually a jam-packed train as it stands, but one commuter service in the US city of Boston took on an extra passenger on Monday.
A baby squirrel got on a train to the delight of some commuters.
He even took up a position resting on a person's arm.
The animal got on at the Ashmont stop and was let off the train at Fields Corner - two stops later.
Passenger Rosanne Foley said they were "concerned the little guy will be injured if he stays on the station platform".
So @MBTA this morning passengers banded together to try and help a baby squirrel who got on the train at #Ashmont let him off the train at Fields Corner, we’re concerned the little guy will be injured if he stays on the station platform pic.twitter.com/Qy25vQf1qG
— Rosanne Foley (@rafdotmass) April 29, 2019
She told Boston.com the tiny animal mistakenly entered the subway car "just as the doors were closing".
She said this prompted some passengers to climb onto their seats.
"They weren't sure if it would attack them. I explained it was only a baby squirrel to help calm things down."
Another passenger even broke off a piece of a granola bar to offer to the squirrel - but it is unclear if he ate it.
A Massachusetts Bay Transportation Authority (MBTA) spokeswoman commended the kindness of passengers, but warned against interacting with wild animals on a train.
Main image via @rafdotmass on Twitter
