I was in the gym training and over by the squat rack was a guy doing dead lifts. This guy was tall and over weight. He loaded 315# on the bar and did the dead lifts. His form was perfect a thing of beauty. Back straight with a little forward angle. Butt well below his knees and stood up with no effort.

Many times I see people using the back to lift. When I saw this I thought this guy is a serious lifter.