Santa Clara county Richter scale

3.0 - 3.9:
Motion comparable to upset stomach after bad burrito. Freeways impassable.
4.0 - 4.9:
Slight fizz noticeable in refrigerated mineral water. Freeways impassable.
5.0 - 5.9:
Wine racks upset. Freeways impassable.
6.0:
Difficult to jog. White caps in hot tubs. Freeways impassable.
7.0:
U-storage facilities collapse. Tsunamis in waterbeds. Small cars upset. Freeways impassable.
7.9:
RVs overturned. Suction-cup Garfields jarred off car windows. Freeways impassable.
8.0:
Malls evacuated. Hackers notice movement. Freeways beginning to clear.
8.9:
Jack-in-the-Box restaurants close. Freeways clear.

Source: San Jose Mercury News, 8/10/89 (Scott Willis)