k well i was mucking around with some stunting before n landed a few grinds n bumps... im gona keep this short for now cause im on my ps3 lol but i'll edit it tomorrow.
the main rule with (nrg) bumps is.. you need to pull up really late so that your wheel hits the bumo, not the bottom but like the lower middle part of the wheel, then once you've bumped hold forward so you don't end up flipping (i'll explain why tomorrow) if you right you should get a decent bump
grinds, well this is just sort of a vaige recount of what i did but.. i'll do some more and figure em out properly tomorrow .. you need to land like you would a boardslide on a skateboard.. or like the bmx in SA .. (you need to be at 90 degrees) and try and being going along side the rail when you hit it, then keep as straight and flat as you can