Version 1
Hey, you know if you had just moved back one foot at three times ten to the eighth meters per second, which is actually 299,792,458 meters per second, since one second is 109 nanoseconds, using dimensional analysis to multiply 299,792,458 m/s by 1 sec per every 109 nano seconds, you would get 299,792,458 meters per every 1,000,000,000 nano seconds, which actually plays out to be 0.299792458 meters per nanosecond. And 0.299792458 meters per nano second multiplied by 39.37 inches per meter comes out to be 11.8 inches per nanosecond, which is approximately 12 inches/one foot behind you, which is how much longer I would have had to wait before I got lost in your eyes.
(Updated) Version 2
You know if you had just moved back one foot at three times ten to the eighth meters per second, which is actually two hundred ninety-nine million,
seven hundred ninety-two thousand, four hundred fifty-eight meters per second, since one second is 109 nanoseconds, using dimensional analysis to multiply two hundred ninety-nine million, seven hundred ninety-two thousand, four hundred fifty-eight meters per second by 1 second per every 109 nanoseconds, you would get two hundred ninety-nine million, seven hundred ninety-two thousand, four hundred fifty-eight meters per every one billion nanoseconds, which actually plays out to be .2,9,9,7,9,2,4,5,8. And .2,9,9,7,9,2,4,5,8 meters per nanosecond multiplied by 39.37 inches per meter comes out to be 11.8 inches per nanosecond. And what is 11.8 inches per nanosecond? That’s right. Approximately 12 inches. And how fast does light travel? 3x108 m/s. Which means light travels at an equivalent to 1 nanosecond per foot, which is approximately how much longer I would have had to wait to see you before I realized I was lost in your eyes