Did you forget your slab of raw meat on BART last night?

Courtesy of Jennifer Christensen Courtesy of Jennifer Christensen Image 1 of / 10 Caption Close Did you forget your slab of raw meat on BART last night? 1 / 10 Back to Gallery

The scene: 9:18 p.m. Wednesday night, Montgomery BART station. A slab of raw meat lays limp, cold and flattened, in the center of a BART seat next to a window on the outgoing Pittsburg Bay Point line.

How did it get here? How much did this prank cost? Is this a prank? A social experiment? Are we being filmed? Do those BART cameras work yet?

Let's start with the evidence.

San Francisco's 4505 Meats founder Ryan Farr believes the meat is likely a quite expensive porterhouse cut. "It's about a pound and a half, probably between $30 and $40 retail," Farr tells SFGATE. "Based on coloring, it's clearly grain-fed, not grass-fed."

"So someone sat on that thing for like two hours," he added. "I would guess multiple people sat on it without knowing. I hope it's not still there."

That's a rather pricey mistake, and now this person (or dog, or tiger, or I don't know, velociraptor) doesn't get to chow down on this choice cut. It's a dinner lost. A supper suspended. Someone's meat is missing.

"It was really funny watching people get on, come to the open seat, and then see it and back away," key witness Jennifer Christensen told SFGATE. "Everyone was thinking it was hilarious."

To BART however, the whole ordeal is a real calameaty.

"Our trains are cleaned and disinfected at the end of each line - but it is always helpful to tell your train operator if there is something creating an unsafe or unsanitary situation, and raw meat on a seat would definitely qualify," BART spokesperson Taylor Huckaby tells SFGATE. "I'm not sure how someone managed to leave their uncooked dinner on one of our seats, but hopefully they will be more careful next time."

This investigation is ongoing.

Alyssa Pereira is an entertainment and pop culture writer for SFGATE. She is on Twitter, and she does not eat steak.