We wanted an early night so I started a fire while my girlfriend started cooking. We ate, had a few beers, and climbed up to our rooftop tent (tepui) with our dog by 9pm or so. I had a rough time sleeping and woke up a few times but finally fell into a decent sleep.
In the pitch dark with all of our tent windows and canvasses closed i was awoken at 1am by someone whistling outside of our tent the tune of "when the saints come marching in". After a few minutes of this repetitive whistling I nudged my girlfriend who awoke and was obviously freaked out as well.
The whistling then turned to chanting things like "when you sleep here you disrespect me, and when you disrespect me you disrespect the US Marines!" The person would then start spelling out words like "F.L.E.E". The verbiage and tone kept getting more aggressive so we decided we had to make a move.
I slowly unzipped the tent while our guard dog was snoring and got my head out if the tent. I took a few seconds to let my eyes adjust and figure out where the person was. I felt more confident once I could somewhat see and hear so I climbed down and the girlfriend passed me the dog and she climbed down too. We flipped the tent up without securing it and we jumped into a truck (while the person was still whistling) to a motel in Crescent City.
The next morning we drove back to get the few belongings that weren't in the truck and a family who had been camping a few sites over said it went on for another 2-3 hours and it was the scariest thing their family had ever experienced.