Here,a kind of macro-post arrays was fabricated with the post height 800 μm and centre-to-centre spacing 200 μm.The post surface is fabricated using a wire cutting machine followed by chemical etching to generate nanoflowers of average diameter 3.0 μm.After a thin polymer coating,trichloro(1H,1 H,2H,2H-perfluorooctyl)silane,is applied,the surface exhibits a superhydrophobic property with an apparent contact angle of over 165°.We show that an impacting drop can bounce off the surface in a pancake-like shape without undergoing retraction process,allowing a fourfold reduction in contact time compared with conventional complete rebound.In particular,by designing surfaces with tapered micro/nanotextures that behave as harmonic springs,the timescales become independent of the impact velocity,allowing the occurrence of pancake bouncing and rapid drop detachment over a wide range of impact velocities.We believe that the surfaces designed and pancake bouncing reported here which can achieve significantly shortened contact times through manipulating the surface structure not only advances our fundamental understanding of wetting phenomena,but also stimulates new applications including anti-icing,dropwise condensation,and self-cleaning and so on,with anti-icing is the most preferred.