The summer of 2005 I was working at Canal and Warner where they put in the bridge to bring the towpath trail over Warner. When they went to pour the concrete for the east side of the bridge, they backed the concrete truck down the towpath next to the foundation hole.
Either the side of the hole collapsed or the driver dropped a wheel into it because the truck ended up on its side atop all the rebar. Nobody was hurt, and we got several hours of peerless entertainment watching them fish the truck out of the hole. That took three big wreckers and the construction company's excavator.
This was not the first afternoon of work we lost to watching that crew get themselves out of a jam.