One of the more unconventional T-shirts for sale at the race track is found in Top Fuel driver Bobby Lagana's "Twilight Zone" Dragster pit. The "Don't make me mad!" warning printed on the back is credited to the driver's father, Bobby Lagana Sr. -- whose likeness appears on the front of the shirt. In the photo, Lagana Sr. appears to be seething with rage.

He was -- when the photo was taken. One of the more unconventional T-shirts for sale at the race track is found in Top Fuel driver Bobby Lagana's "Twilight Zone" Dragster pit. The "Don't make me mad!" warning printed on the back is credited to the driver's father, Bobby Lagana Sr. -- whose likeness appears on the front of the shirt. In the photo, Lagana Sr. appears to be seething with rage.

He was -- when the photo was taken.

It turns out that Bobby Jr. was doing some repair work on the roof of the family home at Scarsdale, New York, and his father was on the ground, three stories below. He called down to his father for something he needed, and the exchange turned into a shouting match. Father and son became more and more animated, shouting and swearing at one another. At some point, without tipping off his dad, Lagana Jr. saw the silliness of it all and decided to play a joke. He scurried down the ladder, ran into the house, and came out with a camera he had hidden from his dad. Then he started the fight again and stirred his father to anger again. At the height of his father's fury, Lagana whipped out the camera and snapped the photo.
Both dissolved into hysterical laughter. And they decided to market the T-shirt.

Lagana Jr. said about 30 fans have purchased the shirt -- "people who know the old man and wanted to get one."