The folks at British Pathé have just posted this video, filmed in Paris in 1949, in which the (unionized) members of Monsieur Roberts' Tame Flea Circus fleas pull miniature cars and bicycles, lift weights, and cause a whole roomful of people to scratch themselves. Also, a man arranges a bunch of car-carrying fleas on his arm into a traffic formation. Considering how bloodthirsty fleas usually are, this is way more daring than any of the circus tricks.