Surprisingly, the octopus got a lot of different interpretations, best one was:
CHTULHU! (I am so using that :)
The dancer and the bridge also confused a lot of people - seem to both have large variation in depiction.
The eggplant has a VERY specific meaning, but...it is only used in that context in the US. It's just a plain ol' veggie for the rest of the world.
So, since I am not US based, I did not get any rude suggestions for that one :D