Recently there was long thread about the BCA. I can now post possible answers to some of the questions, such as "Why is the BCA still raising membership prices when there is a significant amount still left in its coffers?"
Ideal for collapsing loose boulder chokes and frightening the s*it out of you friends. One had a rather short fuse and went off a couple of metres from my mate. We felt sure he was dead but he staggered out of the dig eventually.