This is a once a month bike-ride through the city centre to raise awareness for bikers. It is nice to ride in the middle of the street with police escort and all other traffic just standing by 
Pics from one month earlier on 10 May.
After physical exercise one must take care of re-hydration:
1. Pingback by anderswallin.net › Critical Mass, 2011 September
13/Sep/2011 at 16:38
[...] also June11 and Aug11. This was written by admin. Posted on Tuesday, September 13, 2011, at 16:38. Filed [...]
2. Pingback by anderswallin.net › Critical Bikeride, April 2012
10/Apr/2012 at 18:36
[...] year I think I participated in these events to raise awareness for bicycling four times: June, August, September, and October. This was written by admin. Posted on Tuesday, April 10, 2012, [...]