There are some cities where trams function like metros (have dedicated tunnels for part of the route), but usually the two are separate systems, with different types of rolling stock.
Metros usually go faster than trams, because they don't interact with other traffic, and have less frequent stops.
I used to live with a cat that was eating human hair occasionally. Because my wife has very thick hair, the hair would cause his poop pieces to stay connected, like a chain of poop.
He'd sometimes have a piece of poop hanging out of his butt because of this. When he noticed it, he would sit down on it and drag his butt on the floor in an attempt to get rid of the poop.
It usually worked, but created these long poop smears on the floor.
Suffice to say, we got rid of all our carpets because of that cute little bastard :)
Single board computers that can handle one screen are pretty cheap these days. Ones that can handle multiple screens would be more custom, thus expensive.
Every single other person could also be called the problem, because they knowingly let John do all the work, and apparently weren't interested in sharing the responsibility.
Alcohol is carbs