Flashlights are on the verge of extinction thanks in part to concepts and products like the Private Light from Boyoung Joo Park. The Private Light is a sock with a light on it that is powered by your footsteps.
Late night runs can be fun, but they are also highly risky due to the fact that you can't see what you're about to run into. Private Light socks would remedy this problem instantly, making night runs safer and instantly more fun. Looks like I'll be headed out for a run tonight. Werewolves and vampires be damned.