Morning commuters near Flagstaff, Arizona found their drive on I-40 a bit stickier than normal. A tanker truck was involved in an accident that left the highway covered in a "river of chocolate."

3,500 gallons of liquid chocolate were spilled from the tanker all over the westbound lanes. "This will be a sweet cleanup!" the Arizona Department of Public Safety said.

The accident happened at 9 A.M. and blocked all westbound lanes. Crews had the lanes reopened after 1 P.M.