The truck that almost hits Claudia belongs to Dingle Moving. Dingle Moving has been mentioned in several season 2 episodes, and is a nod to the original series' episode Mr. Dingle, the Strong (1961).
The museum they filmed at is The Museum of Anthropology, UBC/University of British Columbia in Vancouver, BC, Canada.
The mask Mark puts on is of the alien in the previous episode.
The title of this episode comes from the popular saying: "If at first you don't succeed, try, try again."