It's a puzzle - so you can assume that all relevant information is in the riddle:

A man - so it might make a difference, that it's not a woman

comes home - so it's relevant that it is in his home, not his working place or elsewhere

does NOT notice the saw dust - so it would have made a difference, if he had noticed it?

and shoots himself - the consequence, with what is irrelevant.


then again - maybe it is not all the relevant information? <img src="/ubbthreads/images/graemlins/winkwink.gif" alt="" />

In times of crisis it is of the utmost importance not to lose your head (Marie Antoinette)