Paul Rodriguez's infamous challenge has a lot of players scratching their heads, but we suspect the problem has to do more with linguistics than anything else. If words like "hubba" are not in your lexicon, fear not. If anything, you should be proud, because it's just a silly name for the short, concrete wall that lines the stairs in this challenge.
Reno_Rotary- A hubba is a ledge going down some stairs. I think they're names for the same thing, I don't think there's a definite difference between the two.
I think the name or nik-name hubba came from a famous spot in San Fransisco, the [Hubba Hideout]. Its just a ledge thats hidden back a little. Hubba was originally a slang term for crack [in that sense, from the exclamation hubba-hubba, it's been dated to 1988], or crackhead, and [Hubba Hideout] was originally an area where people used crack in public without being seen. Eventually hubba came to be slang for ledge. Who knows for sure though.
check out videos and photos of the original hubba hideout skate spot in san francisco ... HERE.