The central rider of the attackers' leaders raised a gloved fist.
After the rain, the riders raised the question about the safety of racing on the grass.
In the four Canadian events in 2011, 11,000 riders raised $43.9 million.
All riders must raise a minimum of $300 in donations.
The rider closed on the Hellborn and raised his hand in greeting.
The rider ahead on the left jerked as if stung, raised one hand a little, then toppled out of his saddle.
The rider raises the insurance costs as much as 12 percent in some parts of the country.
This year's events start on May 1st, when 500 riders will be raising money for children, cycling to Paris.
The riders turned their noble faces towards the sky and raised their swords.
When riders raise a hand, the race director calls support cars forward by scanner.