Subway train crushes bike tossed onto tracks - GIF

[Frank S]

This wasn't that though, you can see people in some of the cars. A woman in a red shirt or jacket you can see through the window at :13 just before the arch flash and a guy in a black jacket in the door at :37

Then it could be a case of willful intent, or the bike could have been knocked onto the tracks as the result of a scuffle between 2 or more persons. The only way to know for sure would be statements from first hand witnesses or footage from a security camera