Tommy Milner in the number 4 Corvette Z06 GT3.R “communicated his displeasure” with the No. 48 BMW driven by Augusto Farfus. Tommy was the class leader in GTD-Pro and was fending off a challenge from the No.1 BMW driven by Connor De Phillippi when his teammate in No. 48 BMW, which was several, laps down and out of contention, began deliberately blocking the Corvette.

Despite receiving a call from IMSA’s Race Control for intentional blocking, Farfus stayed with it and deliberately held up Milner in the International Horseshoe. Trying to swerve around the blocking BMW, Milner’s Corvette hit the No. 1 BMW, damaging the Corvette’s rear fascia.
As Tommy came abreast of the No. 48 BMW, he opened the small window on the Z06 GT3.R and stuck his entire arm through and extended his middle finger, which was captured by the TV cameras:

Coverage of the race in the next few days was overshadowed by Tommy’s bird flip, which became an instant MEME. Digital artist Abel Toth celebrated the moment with an special illustration, calling it “the most iconic moment of the race.” Now, Tommy and Abel have teamed up to offer a special t-shirt commemorating the bird flip, and the profits from the sale will go to the American Eagles Foundation, which is dedicated to protecting the American Bald Eagle and other birds of prey.

The t-shirts feature Tommy’s logo on the front chest with the back showing Abel’s illustration, and they are offered in three colors starting at $20.
Tommy says on X.com that
A Daytona 24 win shirt would’ve been a bit more fun, but instead we’re going to raise some money for the @AEFeagles In collaboration with @abeltoth. All profit from the sale of these shirts will go to American Eagle Foundation: