My sister and I are getting ready for tonight's Critical Mass celebration. Bikers and bladers (and anyone else on people powered wheels) take to the streets and become traffic. This month is the biggest, craziest one of all: Halloween Critical Mass. There will be ghouls and goblins on bikes and zombies and fairies on roller blades.

If you haven't heard of Critical Mass events, there is an unofficial site, http://critical-mass.info, which features lots of information about Critical Mass events around the world. If there isn't one in your town or city, think about starting one. It is a positive way to encourage bike power.

To read more about tonight's event, visit this page on Dynamic Critical Mass Vancouver. And come join us, if you live in Vancouver.