Dog of War, paranoia starts when you reach for your knife and it isn't there! Soldiers don't carry knives for fun. They don't carry any extraneous stuff! They are tools and get used, albeit mostly for utilitarian tasks, but if you don't have that tool, you have to depend on someone else to carry your share of the load.
You can't jump with an inverted sheath -- jumping only accentuates the inherent shortcoming. If it isn't safe to jump with, it isn't safe to run, dive, roll, or any other agressive action. No matter what anyone thinks, someday that knife is coming out of that sheath when you don't want it to. Not that the sheath is wanting but that some act, body position, or snag will dislodge it.
If you spend all your time worrying about not losing your equipment, you aren't keeping your mind on the job.
You can't jump with an inverted sheath -- jumping only accentuates the inherent shortcoming. If it isn't safe to jump with, it isn't safe to run, dive, roll, or any other agressive action. No matter what anyone thinks, someday that knife is coming out of that sheath when you don't want it to. Not that the sheath is wanting but that some act, body position, or snag will dislodge it.
If you spend all your time worrying about not losing your equipment, you aren't keeping your mind on the job.