I feel fortunate to have never had a fermenter blow the lid or the airlock yet in the 25+ batches I've done. I do have impeccable temperature control though and prefer to ferment on the cool side of each yeast strain's range which helps tremendously on minimizing explosions!
Next up: American Pale Ale
Primary 1&2: American Brown Ale
Primary 3&4: Hopped up Belgian Tripel
Bottle Conditioning/drinking: Summer Kolsch, White Zombie (Amarillo IPA), English Pale Ale (ESB)