First thing that comes to mind is Baki. They set what the top looks like with Hanma Yujiro and show what the standard is like with Hanma Baki. As he goes from teen to adult, Baki pulls out a bunch of super human stuff and it become more common as the series goes on. At one point, people don't even see him as human but more like a force of nature. Just like his father.
They go from cutting a sandbag with a kick or elbow slice to tackling people off a 25 story building, just to warm up.