[Hodar]

If a Neutron star, were to set off an emmision of Neutrons at us - we’d be dead, and never know what hit us. They move at near light speed, are undetectable -

Who knows, the bullet that will destroy earth might have been fired millions of years ago.

[Salamander]

So, should I start eating all the dark chocolate I want and max out my credit cards now, or what?

[Talisker]

If a Neutron star, were to set off an emmision of Neutrons at us - we’d be dead, and never know what hit us.

I don't believe neutron stars emit neutrons, rather, that they are made up of neutrons. Though gamma rays would fit your point just as well - they hit us, we're toast, while looking around at each other saying "what"?