You were fortunate. The groups I found usually had me up against Loudmouth Bully, Someone's Little Brother, and Hyper Nerd.
It displaces the view model and the hitboxes and is an artefact of Valve's lack of synchronization between players and animations. The jumphack trick in GES makes your model "pop" about four feet higher than it should be, as shown in the video clip. A similar problem famous in CSS is related to crouching. You shoot your enemy in the head, you see blood, he immediately crouches and blows you away. The problem is that he doesn't begin to crouch on your screen until he is completely crouched plus the time for that info to get to you. That means when you shot his head on your screen, he was already crouched on the server so your bullet went over his head hitbox.