Question for science folks?

What scares you the most:

1. Solar flares?


2. Asteroids?


3. Comets?


4. The unknown

Just wondering.

For me, it’s probably solar fares… At least there’s the possibility we’d be hit with an asteroid by surprise, but a solar flare? …we got hours of knowledge before it strikes. The ‘knowing’ scares me more than the unknowns…