You'd think he would have known to pull the fire alarm before the meteor hit.

Nostradamus Boat Rentals: We already know you'll have a great time!

So what if we live on the timeline where Nostradamus wrote about what he saw AFTER he went into the future and saw it in a different timeline. Then he was returned to his own time wrote about the future and caused this fractured timeline we now live in. But the things he wrote about never came to pass because the act of him revealing them altered those events to never happen because people knew they were coming and took subconscious action to avoid them. Except for the fact that in 1998, The Undertaker threw Mankind off Hell In A Cell, and plummeted 16 ft through an announcer's table. No one could predict that.

"Young man, I DID ring the fire alarm... 400 years ago!"