I wasn't sure if I could do this when I tried, and my form is not perfect, but good enough for my first attempt.
This was the same day that I tried doing a pistol with a kettlebell racked for the first time. This was also the very end of a long kettlebell workout, about one hour and fifteen minutes.
After which I shot about 5 videos and finally this. A pistol aka one leg squat with 2 16 kg kettlebells. My goal is to be able to do one with 2 32 kg kettlebells like Steve Cotter.
Considering I have only been doing kettlebells for about 3 months, I would say this is a good start.
More kettlebell workouts: http://hardcoreexercises.com/workouts/resistance-training/kettlebell-workouts/