That is a gross oversimplification and shows no respect for anyone involved. You weren't there. Kindly refrain from the finger-pointing.
I was hopping to hear what a bottom up IC failure is. It is not mentioned in the fireline handbook or the IRPG or even my old FOG manual. It's not part of the 10 or 18 either. I can't place it from the many ICS classes I have taken over the years. Maybe it got lost in a sand table.