(CBS) — A video posted on Facebook is generating hundreds of responses, and it shows at least two young men on a CTA Blue Line train, slapping an older man and taunting him.

WBBM’s Steve Miller has spoken with one of those young men about why he did it.

The video goes on for more than two minutes. It shows at least two young men, both African American, slapping an older man on top of his head.

And then they appear to tease him.