I’ll track this down for the fun of it.
The photo was taken near this location: http://goo.gl/maps/KuJlE
You can see the wall next to the steps on the lower right.
The UPS van had rolled down to where the foundation was being laid for a new building.
You can see the dirt (not water) on the middle right to the top of the photograph.
According to this news report from The Daily Princetonian, “UPS truck crashes into Whitman College construction site”, it took three hours to remove the truck, giving the young man (http://donsheehy.net/) enough time to dress in a tuxedo, and his friends enough time to take the photo.