Two things in this picture.
First, I try real hard to minimze the amount of waste I generate on a job. I use as many of my cutt-off pieces that I can and take a little extra effort to plan my cuts to eliminate waste. This pile in the picture is after 120 studs installed.
Second, about two weeks before this picture was taken we had between 3 to 5 inches of rain in my county in one night. The flat area of dirt on the left of the debris pile was a ditch to carry off rain water. All that water filled up my ditch with silt and flooded my apartment.