Here's one of those pedometers to help you calculate how far you've walked and how many calories you've burned with an added feature: a panic button. So if you get nervous going for a jog or walk at night around Shady Park, bring the Sportline 344 Safety pedometer along, and at the first sign of trouble hit the alarm; a 100-dB wail will scare off any potential attackers/panhandlers… probably. It's also "laser tuned" for accuracy and ignores "false steps," whatever those are. Exercise peace of mind for about $30.
Safety Alarm Pedometer, via Shiny Shiny