A crack so thin that it could not be seen —
cracked into the windshield of that machine

A flaw that sits awaiting fatal fail —
the crack that pops and groans, yet still unseen

It will happen quickly; with no warning
from that disastrous crack one could not glean

An unforeseen implosion sounds sharply —
the catastrophic snap of cracked windscreen

So much depends on catching that thin gap
cracks become chasms with nothing in-between

So check your scratches and scrub that glass clean
so cracks don’t masquerade as scrape or seam