This was at least the 4th major (5+) I have been in so I knew what it was. Tens of millions here on the east never have experience one.
And living in such an old house like this and experiencing such a major shake, I did not know what to expect.
First thing I did was grab my phone, run out the door with the dogs, and called my wife.
Honestly, what else can you do in a situation like that.