Here's an uncommon black flag for you. And one that's sure to get the jokester inside of you going.

Tony Stewart, a man with a noted love of food and aversion to working out, was black-flagged during the first practice for the Sprint Unlimited on Friday for not weighing in before he got in the car.

Each driver is required to step on the scale so that the minimum weight of the car can be calculated. A lighter car can be a faster car obviously, so it's an important variable. But the black flag is far from a critical penalty, save for the part of being a NASCAR rules violator in the first practice of the season. It wasn't in race conditions and it's practice for a non-points race anyway.

But Stewart wasn't too happy.

Tony Stewart on NASCAR black flag: "Go f---ing ask them. Go ask those f---ing rocket scientists why they f---ing black flagged us." — Jordan Bianchi (@Jordan_Bianchi) February 13, 2015

If you were wondering what the weight requirements were, here's a handy sheet courtesy of the ever-prepared Bob Pockrass.

Here are the weight requirements for Daytona. #NASCAR pic.twitter.com/1Tw2LZbRAy — Bob Pockrass (@bobpockrass) February 13, 2015

Stewart wasn't the only one told to come back in and get weighed accordong to the Fox Sports 1 broadcast. Denny Hamlin and Clint Bowyer also had to do the same before they returned to the track.

The three-time champion got in 14 laps before NASCAR black-flagged him. FS1 also reported that he and crew chief Chad Johnston had to go to the NASCAR hauler before Stewart could go back out on the track.

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Nick Bromberg is the editor of From The Marbles on Yahoo Sports. Have a tip? Email him at nickbromberg@yahoo.com or follow him on Twitter!

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