This took place back in 2008. I was in Venture Scouting (ages 14-18), the time of season was winter cold and stormy but this night it was clear. Five of us chooe to stay at the other den in middle of a small town farming area.
The den is halfway up a farmer's paddock. There 2 gates to open to reach the den. Nearest house is 300 meters, the other was around 900 meters. The toilets were in next paddock over, roughly a 400 meter walk.
We brought a TV to play xbox and each of us had a couch to sleep on despite them being dusty and all. It was dark, only the stars lighting up the area and light pollution from town in distance.
No curtains in the den as not many people know of its location. After playing we decided to call it a night. We closed door and stacked three 4wd tires to hold it closed.
During the night we heard a car driving very slowly outside. We looked out the window to direction expecting a car coming up but there was no car at all. Things were starting to feel freaky.
We went back to laying down. A few minutes later the door blew wide open even with the weight of three tires against it. We closed it again. Few more minutes passed and you can hear scratching sounds on the outside of the windows but nothing there to be seen and no trees or animals on site.
After an hour we heard car sound again, this time driving away from us as it was leaving the property. This time the sound is like gravel but there no gravel at all since it's grass driveway only. We were all freaked. Still freaks me out to this day.