This being Texas and all, the store clerk was also armed and the clerk and armed robber exchanged gunfire. The two robbers fled the scene.
In one of those terrifying tales that some segments of society pretend never happen, the armed robber then came back into the store and exchanged gunfire with the clerk again.
This time, the clerk was struck in the leg and the robbers made off with an undisclosed amount of cash.
I know that most of us who carry every day understand it is our job to defend ourselves in the time between when trouble strikes and when police respond. This just goes to show how long that "few minutes" can really be.
We wish the best to the store clerk.