Unfortunately it has thrown a connecting rod. This happens due to either a connecting rod bearing being spun out and the resultant play in the connecting rod at the crankshaft causes the connecting rod studs and nuts to snap, or a connecting rod bearing seized and the sudden stoppage of the bearing causes the rod to snap off.
As to why either of these occurs, it is due to one of the following:
-poor maintenance where own has gone way past oil change recommendation
-low oil level
-oil sludge that restricts oil flow to the moving parts
-foreign object in oil pan (RARE)
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