I must respectully disagree on this target for biomechanical cutting. I have seen this in print, on the errornet and even in magazine articles, but the tendons on the outside of the forearm do not control gripping. This is simple anatomy and kinesiology, so before this turns into a debate, please do look it up.

This assumes, of course, that the "outside" of the forearm is the part corresponding to the back of the hand; the hairy side. I am neither recommending nor condoning cutting a thief, nor advocating nor discouraging biomechanical cutting. (This whole idea of making little cuts to disable an opponent causes lively debates in martial arts and self defense forums!) I just don't want a cyclist to go into a fight against a thief, with the intent to use a technique which is likely to not work as planned.