[Faceman]

Now for another easy and quick one.

And again I leave fact collection, approximations and interpretations to you.

Assuming you are driving in a very nice sports car (any of the Italian V12s fore example) at top speed.
What would the cinetic energy of the car be?
How long could you as a human sustain on that energy? (You may approximate or use your actual values).

And another one I always fancied:

How big (and filled with what gas) should a baloon or Zeppelin so that upon his explosion (and after a cooldown) there'd be a noticeable rainfall over a major city (e.g. New York).