A derailed train snarled traffic Friday morning in Saginaw County Michigan.
The train went off the tracks in Carrollton Township just before three Friday morning.
The reason for the derailment was a pig, but it is not what you think.
When the rail company called to report the accident, the engineer said a "pig" caused the derailment.
The engineer was actually talking about a propane tank, which is also known as a "pig."
The rail company uses the propane tanks to heat the tracks during winter.
The confusion took several hours to sort.
Luckily no one was injured.