On 2/25/2014 1:10 PM, TimR wrote:
This is easy enough to check, but you needed to do it right away.

Fill a glass of water and set it on the slab.

If it's vibrating you'll see ripples, little concentric circles.

If you don't see any, it's you.

If you see big rhythmic ripples in the surface of the water, it could
indicate that a dinosaur is headed your way. ^_^

TDD