What I do is fart. Well, that leads to the next question, obviously. Have you ever used the Velostat helmet and, if so, which method do you feel is more prone to results?
No helmet. Also I have the advantage that my ammunition is inexhaustible (until I assume room temperature) and always available. If you read the site, the author is very worried about the aliens stealing the hat while you are not wearing it.
--Boris