Boosters are accepted, but are really lame
About the stunt itself, well, I wouldn't describe it as a real stunt since you only do like 2xbump2 360. But still, try to land some buildings, some precisions, grinds, and all kind of stuff you could find.
Try to get that "feeling" about how good is a stunt. For example, just look at some older vids on SA and VC. It'll help you
Otherwise that was ok. I hate the use of boosts, ramps, and slowmo. But some people outside GTAS don't care at all.