That's about time you take a zippo or other wind-proof lighter and see if your "taco-bell afterburners" are in good working order.

I found off-roading it often gives them the idea...if I feel threatened I jsut cut through a yard or alley....I usually make it a point to apoligize to the lawn owner for putting a road tire sized gash intheir lawn and offer to help fix it up on the next weekend if I see them on my ride by. Most large vehicles don't like alleys.

Smaller vehicles, just go off-road if you can.

If you were in a car, well there's a whole slew of tricks for that...I had to teach my mom how to lose people a few years ago (long messed up story...bottom line stalkers suck..I had to follow her to and from work every day for 6 moths due to this a-hole)