A conductor who appears to be working on a LIRR train gave a little performance, including harmonica, a “hat trick” involving his blue chapeau, (mercifully short) rapping, and some Borscht Belt humor, to riders recently.
The video is posted on Huffington Post.
Based on his musical skills, I’d advise, don’t quit your day job.
And hopefully the MTA won’t take your day job after this not-in-the-handbook performance. 
I believe this was a Metro-North Conductor. the style of the hat and name badge are not what the LIRR uses, but it does look like what MNRR employees use.