As if we mostly don't sit around on are phones during transport.

You think this is funny?
https://youtu.be/kHFnc_eV4Lg?si=o46VCxxcVUlDz1gm

A crack shot is an expert marksman or sharpshooter, someone who is extremely accurate and skilled at shooting a gun. The word "crack" in this context comes from an older use meaning "excellent," "top-notch," or "first-class," referring to someone or something superior in skill.