Because they engage in a high-risk activity on purpose? Hardly unusual.<p>You might be surprised at how thoughtful and considered the advice that you receive from BASE jumpers is (apart from perhaps the comment above).<p>Certainly, the successful execution of a BASE jump, especially on a closed site, requires much forethought, planning, skill, knowledge, and also good execution. Most serious BASE jumpers are not at all foolhardy. They will have several contingency plans and also have set predetermined safety parameters outside which the jump will not take place.<p>In the case you are forced to jump from anything, with or without anything, a BASE jumpers advice may be the best you can get.