Ears almost freak me out more. We can instantly, with no thought, tell where a sound is coming from, to a high resolution. Even behind us! All based on how fast and loud the signal hits our ears at different times. The speed of sound is right there with a slightly slow bullet. We can differentiate the "ping time" between one side of our skull on the other. Fuck me that's wild!
Speaking of bullets, I can pick up the delay between firing something slow like a .45 or .22 and hitting a target a mere 40' away. How?!