The following is not a joke:
I was 13-14 years old.
I'd always wondered how an earthquake would feel like.
Suddenly one day, the flat I was living in started moving sideways (back and forth). Imagine my astonishment "WUT". I could confirm it was not in my head since there was a maraca (musical instrument) nailed on the wall which was going back and forth as well.
I even called a friend on some lower floor but he didn't feel anything. Guess it only happened on the highest floors (I was in the 6th).
Of course, you may be thinking, "but there were no earthquakes on Buenos Aires 6-7 years ago"... and you're right!
What was it? That night, a Metallica/ACDC (or other, I don't remember, I just know it was a known band = huge) concert was taking place like 20 blocks away.
The jumping up and down from fans made my freaking flat shake.
And I don't mean a mini shake like a vibration. No. I even measured it (with what I could at that time... I used the maraca as a pendulum) and I obtained a 2 second period.
Awesome.
But scared sh*tless.