Well, I remember one night my friend and I camped out on my grandfather's huge boat, lol. XD We were spending the night at my grandparent's lake house, and we got the idea to make a tent-like thing on the boat. Of course, it [the boat] was pulled up inside their boathouse, but it was still fun because the wind would rock it a lot. (It took us a long time to fall asleep, but oh well, lol. O_o) We brought a lot of snacks and flashlights, and we read books and stuff. In a way it was a bit creepy, because we were outside alone, but it was still fun!
And hmm... I've also slept in a tent several times when we went camping, on the floor, on the couch, blah blah. Nothing really out of the ordinary, lol.