I actually would like to choose the track where the number of people increases by one (so 1, 2, 3, 4...) and then the train will kill -1/12 people

PS Yes, I know this sum result is problematic, it's only a joke

I leave it at whatever it was set at before I arrived. Why mess with destiny?

I quickly carry the people to the other side so they all can get run over.

The existence of the bottom track would imply an infinite density of people, which would create a black hole and kill everyone involved, regardless of the trolley's presence

Probably pull the leaver cuz then I can jump in front of the train.

Since there's an infinite number of people to kill in either case I can just do nothing, and thus by inaction most of those infinite people will have more than enough time for someone else to rescue them. Maybe the State, that's what they're there for.

I would take a sledgehammer and smash the trolley to bits, thus solving the problem and saving infinite number of lives. There's always another option available.

Slip the switch, like always

Do nothing - maximum destruction

I have a tangential question I have been wanted an explanation for:

If there are infinite universes, would there be infinite earth's?

I remember (an) answer is infinite universes doesn't necessarily mean infinite earth's. A cool analogy of a CD rack was used when I read it, but I can't find it. Does anyone else have an explanation and/or analogy for this?