hahha, chop hops! Me and my mate used to bust those out around 9 years ago. We thought they were sweet back then but really, there kinda gay. I did one a month or so ago when i was living in Sydney (Australia) I landed it and laughed at myself.
But if you want a tip try them on your backhand or in the wash. If you do a backhand or forehand reo in a closeout. Kinda just rip out into the flats and so an ollie 180 like on a skater.