flintstoning

Being in the middle of a task at work and just dropping it and leaving the minute your shift ends.

(In the first 10 seconds of the Flintstones intro, Fred is busy lifting a rock out of the quarry, but as soon as the whistle blows he's out of the quarry and into the car)

"Never give him a task that takes more than 15 minutes at 4:45, because he'll be flintstoning on out of here at 5:00."