why it's so difficult for them, all u need is to have a good sense to intuition where people is going to walk on by and put the clays there, always in the traffic zone must be 2 rushing guys to run like a crazy and dont realize what's on the floor and bang!!!!  On the other hand i got the rhino when i was prestige 5 and now i have all the animal emblems, but if u want some advices let me know, and i'll answer ..  ATTE:  JOLUVE4u