Damn mutt! — the man shouted, and together with his colleague he ran after it.

And that was the exact moment when something unexpected happened, after which everyone understood why the dog had been behaving so strangely.  To be continued in the first comment 

They had only run a few meters when suddenly a deafening explosion rang out. One of the gas cylinders standing next to the pump had unexpectedly detonated. The shockwave rippled across the station, and flames burst out