[sbuttgereit]

There's more perceived wiggle-room with rationalizations, not actual wiggle-room.

The only moment in the scenario that matters is when you've made your choice and as others have said: it's binary. You pull the lever or you don't. The moral act is in making the choice, not what comes after. In that moment of choice you've expressed a hierarchy of your values.

Now, you might value most highly your own mental well-being, and making the most of that by rationalizing to yourself that you didn't actually make the choice that you just made. You might value your social standing or legal disposition the highest and make the choice accordingly. etc.

Of course, the scenario itself is a bit silly and not the kind of everyday living guidance that one will most likely have thought deeply about in anything than abstract moralistic terms. It's pretty rare to face that sort of scenario with that kind of consequence.