Some plants generate fast movements when mechanically stimulated, and use this ability to disperse their seeds, protect themselves against predators or get extra-nutrients (Dumais & Forterre 2012, Poppinga et al 2013). Among these nastic movements, the carnivorous plant Venus flytrap (Dionaea muscipula), whose leaves snaps together in a fraction of second to catch insect, has long been a paradigm for study (Darwin 1875, Escalante-Perez et al. 2011).