Tip up shoulder strap carry makes it faster to get to the knife with either hand. The disadvantages are it's easier to lose the knife and it better be a d**n good sheath or you're going to give yourself a tracheotomy the first time you trip.
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Hope for the best and prepare for the worst.

The object in life is not to be on the side of the majority, but to escape finding oneself in the ranks of the insane