[@MelonHead]
Few things: The observations happen AT Mach 5, as his eye scans you faster than his brain registers and then it catches up a few milliseconds later, so cutting them short isn't happening. The thorough analysis happens in somewhere under a thousandth of a second, which is what 4x human thought speed is. Him speaking out loud about it, yeah, that'd be cut short. 

As well:
[quote=@MelonHead]
Due to both of them choosing to run at the other, the gap could be closed in a pittance of time, meaning that for Shin to draw his weapon now would take too much time, leave him vulnerable, and seal his fate.
[/quote]


Two posts prior:
[quote=@LeeRoy]
Withdrawing his weapon from his belt loop and letting his arm hang with it, testing the weight by swinging it back and forth.
[/quote]