There is a lever, which, when manipulated, will switch the trolley to a different set of tracks with one mine worker on it.

What will you do then?

Ahead, on the tracks, there are five mine workers. The trolley is headed straight for them.

There is a runaway trolley barreling down the railway tracks. This and the following have been rephrased somewhat in the TL to make the "trolley problem" clearer.