How to use "spur" in a sentence

Although he spent more than half his time working in his Las Vegas office, he often had reason to fly to far points at the spur of the moment: Reno, Elko, even out of the state to Texas, California, Arizona, New Mexico, Utah

He wasn't scheduled for R and R, and on the spur of the moment he couldn't think of an excuse to sign out one of the Range Rovers, so he tried to escape on foot