The scars that are visible on Sean Matthews' face make me feel very uneasy. My life may end in a heartbeat, and the thought of that fills me with dread; all I have to do is glance at the clock and think, "Let me back."

After that, he needed to open up the display case made of glass and be ready to place the watch inside.

I don’t know whether it’s nervous, afraid or absent-minded. It was my watch that tapped on the edge of the cabinet made of glass. Because I wasn't holding it tightly, it dropped to the ground immediately.

After a brief inhale, I let the watch...