The big bang may never happen again, I've only had it happen 3 times when my smoker was new. After I used my smoker 6 times, hasn't happened again.
But I also got nothing but ash, and the smoke was always a thick white smoke. So I tried some foil boats and got more blue smoke and charcoal. Then I made some trays out of aluminum flashing that fit the wood box and have been very happy with the smoke since. The only time I don't use the trays is when I'm drying jerky.