How long did you ferment the beer? What was the final gravity? And did you take more than one gravity reading at final.
My guess is that it was bottled while there was still some fermentation happening. That would create co2, then adding the priming sugar would create more.
If you get bottles that are not carbonated as well as the bombs then it would be an uneven mix of the priming sugar.
I suggest a heavy long sleeve shirt, leather gloves, and a face shield when handling the bottles.