This is one I personally witnessed.

It was still very early on in the career on base. A normal procedure from day to day was to be given a set of tickets from our ticket manager, and then we would work them. We would contact the customer through phone and email and get more information on the issue or to meet. We operated across the entire base, which was a city unto itself, so we needed to know which building and room to meet in.

This proved to be a difficulty at first because every building on a military base is numbered. Every tree is numbered. Every fence segment is numbered. Everything planted into the ground was numbered, and numbered differently. So you could be standing in front of 2500 and 4913 at the same time not knowing which was the building and which was the street lamp. There is also no rhyme or reason I know of as to the ordering, so 012 could be a historical replica decommissioned plane on one street and 013 could be an air condition unit tuckered away behind building 1808 four streets away. The streets are at least logical in that you have street A next to B next to C as part of a literal grid.

We had maps, but they did only so much.

I had to call the office twice while driving up and down the streets to get any idea where the building was. Finally, we figured out it was a tiny barracks tucked away inside of a larger complex we rarely went to. The place was fenced off and required me to be escorted, even inside a base, so I called to let them know I had arrived. A man came out and let me in. He was thankful I showed up and took me inside. The barracks was a hall with a series of dorm rooms on both sides similar to a college university. 

I was escorted into one of the dorm rooms with the expectation to fix a computer.

I immediately stopped and gaped at what I saw. My escort facepalmed. And the other three marines inside the room all froze and stared at us like deer in headlights.

There were weights and exercise equipment all over the room, but at the opposite side was a couch and three marines standing in front of the couch.

There was a cleaver in the couch. There was a manchette in the wall above the couch. Then add another dozen knives of varying sizes including butter knives, bone knives, chef knives, skewering knives, at least two swiss army knives, and more. I think the only kind of knife that wasn't impaled into the wall or couch was a bread knife.

And you had one marine standing in front of the couch holding a bullseye board to his chest, where there were two knives imbedded into it, and the two other marines standing in front of him holding knives up in mid-motion to throw them.

I don't remember who unfroze first, but my reaction was "What the ****?!" while my escort yelled at them for being really stupid.

I walked by everyone to the computer and set to work fixing it while my escort yelled at them. After some time he apologized to me for it, as if it was his fault. I simply told him that I was receiving a crash course in what it was to work for Marines.