How did they film the gun spinning scene?

Question

In "End Times" (Season 4 Episode 12) of Breaking Bad, there is a scene of Walt sitting near the pool. He places his gun on a table and spins it. The gun ends up pointing at him. He spins it again, and it points at him again. The third spin ends up with the gun pointing at a potted Lily of the Valley plant (awesome Chekhov Gun scene!). Now the spinning and the stopping of the gun are all done in one shot (the first two spins are both in one shot). So how did they manage to get the gun to point at the desired locations like that?

Answer 1

Knowing how well-crafted the show was, there could be a chance that there was a mechanism that stopped the gun at certain points, but the more likely answer is that they just filmed the scene multiple times until they got it right. It doesn't seem very professional, but it happens all the time on many sets of many movies.