There's a lot that can transpire in those split seconds surrounding a break-off, and the collection of all these little factors will determine a bass's temperament immediately after. Did it become wise to the hook pressure? Did it see you? Did you make a lot of noise afterwards and spook the bass? The best time to answer these questions, however, is after you cast back to the fish for another shot. If you don't do that first, it's a guarantee you won't get your revenge. In this guy's case, I suspect the bass never had ample time to feel the pressure of being hooked, and because he acted calmly, he was able to score that second eat. It doesn't always work, of course, but keep it in mind before you curse at the sky and throw your rod in the lake the instant your line pops.