Guy belting out Bon Jovi song on subway gets help from fellow passengers.

A video has been making the rounds of a subway rider singing Bon Jovi's"Livin' on a Prayer"at the top of his lungs. He's wearing earbuds and standing in front of a window, so he has no idea that the rest of the passengers are into it.

And when he stops short of the high notes, they laugh . . . and then one woman finishes the verse.