Alexandre (Jean Dujardin) is supposed to be 1,36 as he is a dwarf, but when he falls off the plain with Diane Duchêne (Virginie Efira) they seem to have almost the same height.
When he gets out of his car, he is taller than the car, although he should be shorter with his 1,36m.
When Alexandre pulls into his house, his car makes an audible internal combustion engine noise, even though it is a Tesla Model S.