I just want to point out something that might be relevant, namely that as a combat vet, I learned that adrenaline is a drug like no other, and it's also extremely addictive. A key point that many adventure seekers fail to take into account, and I think it can sometimes adversely affect their analysis of situations at the moment of truth. Always be prepared to call something like this off, up to the very last moment, don't let the excitement or pressure overcome the logical side of things.