MBTA Transit Police report arresting a man they say tried to piggyback a plainclothes cop into Park Street around 11 this morning.

Robby snapped this photo of a cat on the Red Line this evening. A cat in a stroller. A big-ass stroller, apparently. He tweeted:

What's wrong with this picture? Many things ...

Another commuter, AH, also took to Twitter, around 6:20 p.m. and was more specific:

Lady with a cat in full-sized/meant for children stroller preventing me and 8 other saps from going on T. #wtf #catbitch #mbta

Ah, but the cat owner tweets, too. In fact, Coco Koh has blogged about her adventures on the T with Jacoby the Abyssinian. So she tweeted right back:

FYI snippy woman on the Red Line: cats (& dogs) ARE allowed on #mbta as long as they're properly contained!!!

MzKeating chimed in:

[H]ave you ever tried to get a cat to walk on a leash?

Robby answered:

No, that sounds ridiculous. That was her rationale as well, along with cat does not like the escalator. ... Let's recap, cat, stroller, peak hours, capacity train. No, still not reasonable. Thing was gigantic.

Keep up to the minute by doing a Twitter search on #strollercat.

Boston to a T has compiled positive comments about T service today.

Photo by MBTA.

Subways, commuter rail, buses, the whole megillah.

Rob McDougall reports somebody was shot in the arm shortly before 7 p.m. The suspect was described as a black Hispanic male who fled in an older Civic last spotted headed toward Revere.

Andy Dost reports cops were in no mood to explain what was going on to bystanders:

Armed police have set up a tape perimeter at the Orient Heights stop. An officer told me when I asked, "Escaped zombies."

Six teens were arraigned today on charges they attacked a woman on an Orange Line train yesterday evening and made off with her cell phone. And after they were done, they exchanged high fives, the Suffolk County District Attorney's office reports.

The DA's office adds that one of the teens, Eric Thompson, 18, of Dorchester, was arrested at Transit Police headquarters in Roxbury when he showed up to help bail out the other teens - still wearing the same sweatshirt he allegedly wore during the attack.

The Globe reports a T worker who found a wallet on a Charlestown bus seat with $900 inside returned it to its owner.

MBTA Transit Police report a man responded to a bus driver's refusal to let him off the bus exactly where he wanted this morning by punching the driver in the head, pushing out an emergency-exit window and jumping out.

Boston EMTs rendered aid to the driver, stopped at 700 Albany St. around 5:40 a.m. Police continue to hunt for the puncher.