hmmmmHere is another plot twist I just thought of. You have inadvertently switched the track when you learn about the situation, so the train is heading toward one person. Will you switch it back to its original track, which will kill 5 people, instead of letting your mistake inadvertently kill 1?Another variation of the plot twist. You didn't pull the lever inadvertently. You pulled it because you weren't aware of the one person on the second track.
In this scenario, both decisions involve you action. Hence there is no excuse of being a passive bystander.
When you become aware of that person, will you switch back to the original track, which will eventually kill 5 people?