Thanks to reader Katica who sent in this photo of a concrete pour in San Diego. Notice the trucks lined up at the top of the photo.

From her email: “This was a 258 truck-ballet in which the contractor placed 11,500 yards of concrete in one monolithic pour that got started at five in the morning and finished by three in the afternoon.”

Did you do the math? That’s 258 trucks in 10 hours. 26 trucks per hour. Or if you like, 1 truck every 2 minutes 20 seconds.