I first found out about one of the four disasters via an article at cracked.com; thus, I thought it was a joke. However, I did some research and found out that molasses really did kill several people (21) in Boston back in 1919. Imagine an 8 foot wall of molasses chasing you down the street at 35 mph! I may have nightmares. :-)
Another of the disasters described in the article linked above was an explosion at a Minneapolis flour mill. This reminded me of an important principle regarding kitchen grease fires: DO NOT under any circumstances throw flour on a grease fire! It might seem to make sense that the flour would suffocate the fire, but it ain’t so. You run the risk of a big explosion in your kitchen. Instead, turn off the burner and put the lid on, or throw a wet towel over it. This will put out the fire.
BTW don’t throw water on the fire either! It will splatter the burning grease and the whole room will go up in flames.