I think you have the general idea here I balance on my rear wheel (Stationary) untill I'm just about to lose it, Then I compress, (I touch my ass to the rear wheel) Lean a little towards the way your going, Then make a sharp movement upwards with your body, But downwards on the pedals... I think the key is a snappy,fast movement out of the blue from a balance point, Watch Nezza tunnicliffe (Sidehop genius)