some helpful information is that it's the trolley problem, and usually there's a lever that changes which track the trolley goes down to kill people.
The red and blue trolleys are self explanatory.
Yes, I am a little familiar with the trolley problem, and I was familiar enough with US politics to suspect the colors were related to the main polotical parties there.
Still failing to understand the joke.
Perhaps I'd enjoy having one. But I was mainly reacting to a confusing picture in my timeline and was hoping someone could explain it to me, thinking that there was a possibility I was missing something.