In the movie *[Wanted](http://www.f1895.com/dongzuopian/3.html)*, the secret assassins dispatched by the mysterious killer organization "The Fraternity" possess extraordinary marksmanship. They can make bullets fired from their guns turn in the air at will by flicking their wrists, like missiles bypassing doorposts and walls to kill targets hidden behind cover. Is such a thing really possible in reality?
Theoretically speaking, if the speed of the wrist movement is close to the muzzle velocity of the bullet, it may influence the trajectory of the bullet's flight path, producing a curved shot similar to a banana kick in football, thereby achieving the effect seen in *Wanted*. However, this is likely very difficult to realize in reality.
A bullet is a solid, unchanging weapon, so the Magnus effect is extremely minimal. (The Magnus effect refers to a phenomenon in fluid dynamics where a rotating cylinder moving laterally experiences a force from the fluid perpendicular to its direction of motion.) It is simply impossible for such an exaggerated curve as depicted in the movie to occur.
Moreover, the firearms used in the *[free movies](http://www.f1895.com)* are rifled guns. The bullets of rifled guns are given a spin when exiting the barrel due to the rifling, which produces a gyroscopic stability effect. This makes the bullet more stable during flight than a non-rotating object. Therefore, flicking the wrist might cause the bullet to miss the target, but it is impossible for it to exhibit the exaggerated curved motion shown in *Wanted*, let alone the situation at the end of the film where Angelina Jolie's bullet travels around the entire area, killing everyone before returning to the starting point.