When his .38-calibre revolver failed to fire at its intended victim
during a hold-up in Long Beach, California, robber James Elliot did 
something that can only inspire wonder: he peered down the barrel
and tried the trigger again. Happily for most concerned, this time it 
worked.

One student was stuck and wrote: The proof of this is
left as an exercise for the reader.
The prof wrote: Did it, fell for a non sequitur and made a 
minor calculation error. You get a B+.

In Hong Kong, a betrayed wife is legally allowed to kill her adulterous 
husband, but may only do so with her bare hands. The husband's lover, on 
the other hand, may be killed in any manner desired. (Ah! Justice!)