This is a core exercise that will be the base of many other variations and provide you with a solid muscular foundation to tackle more advanced movements.
I will let the master, Pavel, Explain:
Start out by lying on your back holding a kettlebell up with a straight arm, as if you have just finished a one arm bench press. Without jerking or unlocking the elbow, stand up and then slowly lie back down. Although the elbow does not bend whatsoever during the duration of the set, the get up can be wiggled into the ‘press’ category, because the static overload of holding a weight overhead, surprisingly, builds pressing strength.
*From the book, Enter the Kettlebell
I suggest you watch the following movie found on Youtube which is a pretty good example and get a good idea of what we are talking about before you attempt this.