This is James McAvoy's third film, where curving bullets play a crucial role. The first one is Wanted (2008), where McAvoy is part of an elite group of assassins who use curving bullets as their primary technique. The second one is X-Men: First Class (2011) where a bullet deflected by Magneto causes McAvoy (Xavier) to lose his ability to walk.

Finally, in this movie, a curving bullet is used as a plot element in the assassination of the U.S president and is the reason why Magneto is in jail, necessitating a rescue from McAvoy (Xavier). The second one is X-Men: First Class (2011) where a bullet deflected by Magneto causes McAvoy.