I have two that I remember most.
The first one was at the St. Anthony dunes 3 years ago. I was giving Bukithed a quick ride in the small dunes near camp. I came up a dune at a 45 degree angle and launched off a lip into a curved slip face. It should have been no big deal, I had good sight of my path ahead. But I guess I hit it a little too fast and at just "that" angle. I launched about twice as high as I meant to, which was not such a big deal, except the buggy rotated clockwise in the air, landing on the two right side tires, which were on the downhill side of the dune. While in the air, I for sure thought I was going to roll the car. But as I landed I steered down hill and pulled it off. I think Bukithed had to change his shorts after that one.
The other time was at Glamis. A group of us went to Olds at night and hardly anyone was there. Nobody running the hill at all. A teenage kid I know, but that doesn't normally camp with us, asked me for a ride. I know he is an exceptional quad rider that races all the time, so I figure I'll give him a good ride to show that buggy drivers aren't slow. I messed around a bit on the hill, then decided to do a 3rd gear run across the face of Olds, from left to right. I was about 3/4s of the way up the hill going directly sideways across the hill. Well... it was the first time I had crossed Olds sideways that season. There was a lip a little more than half way across that wasn't there the season before. Since I only have two lights that aren't that great, I never saw the lip. I hit it wide open in 3rd gear, never lifted at all. Of course once airborn I lifted off the throttle and the silence was EVIL. We were high enough in the air that we couldn't see the ground at all. I just knew, I had a feeling, that the landing would be ugly. I had no idea how high off the ground I was, how far I was going to fly, or if I would land out of shape. What was probably only a few seconds of air time sure seemed like forever. Then it happened. I landed relatively flat, front tires first but nowhere near an endo, and while it did bottom out pretty hard, no damage was done. I got back on the throttle and continued on as if "I meant to do that." The kid wasn't buying it. He knew better. He knew I effed up. And he swore to never ride with me again.