Here is the story about the spectacular failure.
About 6 years ago I had a piece of Sugar Maple left over after cutting some backing strips so I decided to back it with a strip of Elm. The Elm backing was quarter sawn and the bow was an ALB about 69" long with a flat belly. I had the bow tillered out to 29" pulling about 55#. I was in the house, in the kitchen in fact, and was doing a timed photo of a full draw when there was a mighty crack, a boom more like, and pieces of the bow went flying all over the place. There was a bowl of Apples nearby and one of them got skewered by one of the pieces. The wife was not happy, after she recovered from the shock that is. Granted it was the middle of Winter and it was quite dry but I have shied away from Elm since then.