In the military, a mate of mine was on a selection course for working at a specialist unit. Part of this training was escape and evasion. During one of their briefings, the instructor explained how the guys would be chased across the training area, tracked by a hunter force that used dogs to track them and helicopters to find them. A massive para that was sat next to my mate on the front row piped up 'Well, if a dog tried to attack me, I'd just grab it's front legs as it jumped up at me, pull them apart, job done'.
The instructor, clearly having heard complete macho sh*te before, walked out of the room. 10 seconds later, an RAF dog handler came in, with a German Shepherd on a rope. He walked up to the para, gave a command to the dog, which then jumped up at the para, snarling and trying to bite his face off, whilst being held back by the handler. The para literally pissed in his plastic chair.
According to my mate, the RAF guy and his dog walked out, the instructor walked back in and carried on talking as if nothing had happened