This has always been my option. Derail the train, if there is a moral choice it is to do everything you can to stop the trolley and failing that is the only guiltless choice.
If you tried a third option over the two choices given then you can't feel guilty if the third option doesn't work.
If I was forced to chose between one life or five lives, I chose the possibility of property damage.
Edit: I added the word If, which I missed originally.