An approaching sandstorm.
I decided to spend the night out in the open with nothing but a beaten up mattress and a sleeping bag. And I need to tell you, it was SO worth it. It was a very light storm, since I managed to almost not get any sand in my sleeping bag, but still, the experience was absolutely amazing. Not being able to get a comfortable sleep due to feeling the cold wind intruding through the breathing opening, and the noise of the sand pouring from all directions? 11/10, would do it again!
Even Ali, our guide, called me crazy after that stunt :D