How do I get the Finding Every Gag?

Hi:
How do I get the Finding Every Gag prize?

don't know how either, I am trying for that one too, come on everyone....share the hints. I believe that I have clicked on every gag that has appeared????? And have gone around career path to be best time holder on all but 4 so I don't think I have missed any gags.

Same did I tried but I can't get that trophy