i'm really old, 47, and skated in the late 80s in jersey. tricks trickled down to us from towns closer to nyc and the associated skaters, shut folks like kepper and felix. we said chinese ollie when we popped off a crack in the sidewalk. in retrospect people were dong actual nollies at that point (check out gonz and tommy in the savanah slamma vid from '87, blender in tempe in '86), but we did not know it nor did we hear that term. we said gazelle rather than helipop with the understanding there really was no popping going on. just a kind of sassy pivot thing. we saw ray barbee do them in public domain.