I was mightily impressed with Breyton Poole winning the boys' high jump by a significant margin, 10cm. Then the IAAF gave me the background that I hoped would be made available to the world - he's only 1.72m tall, yet launched over 2.24m to win the event, even attempting 2.27m.
That winning clearance is an astounding height differential of 52cm!
There have been very few jumpers capable of exceeding their own stature by that much - Stefan Holm of Sweden comes to mind. He was 1.81m tall, and managed to hoist himself indoors over 2.40m, or 59cm above his head.