I got goosebumps because of a password.

I logged into Millie's Library, and it told me to change my password because it had been over 90 days.
I entered one of those passwords I habitually reuse,
but no matter how much I thought about it, I couldn't figure out why I was using that specific password.
Then, while I was eating, it suddenly clicked that the password was the last few digits of my rifle serial number from my military days.
The strange thing is, even though I haven't used it once in over 20 years,
I can remember both my service number and my rifle serial number so vividly.
What was even more amazing was that the 5.56mm live ammunition number popped into my head, so I searched to see if it was correct, and it was.
It really makes me realize once again how incredible human memory is.