[ALittleLight]

Two points:

1. Delayed choice quantum eraser experiments suggest to me, unless I've misunderstood them (which is highly possible), that effects can affect causes. https://en.m.wikipedia.org/wiki/Delayed-choice_quantum_erase...

2. Getting shot in the head isn't always fatal. The bullet could deflect off your skull, or even go through your brain and just not hit you. The bullet could experience spontaneous existence failure, or simply fail to interact with the matter in your body and pass through you. My limited understanding of physics says that things like these are possible but massively unlikely at large scale. However, if some set of things are possible but rare, and the only alternative things are impossible, then something rare will happen.