Here is a great post from bikinginla about safety tactics for cyclists. The points of greatest interest to me are tactics for falling and how to turn using body weight.
Go to 1:50 of this video where a motorcyclist shows off his hands free turns. Obviously must faster and more stable than a quick turn with the handlebars. Worth practicing.
Practicing falling off the bike sounds like a good idea too. I wonder if Jens practiced anything that helped him in this one.
He finished the leg too, on a borrowed kids bike.