What? Really? You stopped the fire?
Okay, there is a basic principle you need to understand. Fire needs air and fuel. There are these things on the WSM we call vents

and when the fire is too hot, we shut them and when the fire is not hot enough, we open them. On occasion, the fire really gets out of control and we even close the top vent for a short period of time in order to get things back under control. The bottom line is that once you start your fire, you can control it with the vents. When it looks like it's going to high, start shutting down the bottom vents first. Try to leave the top vent fully open until nothing else works. The real key is to shut the vents down before things get too hot. You'll get the hang of it as long as you work on the vents and stop dousing your fire.
There is another couple of principles you may need to understand. BBQ is a lazy man's game. Sure, there's a lot of work involved, but grab a beer and take it easy. Busting up a fire was certainly the hardest option compared to closing vents. Another concept is fire control. Calm down. Nothings going to happen if the fire goes hot except the food will cook faster. It's not an oven, the temp will fluctuate. Adjust your vents and give it time to adjust (15 - 30 minutes). Control your temps on the way up and you'll get the hang of it. When I started out, my WSM was very unstable but over time, it gunked up and I calmed down and now, it runs rock solid, right were I want it to.