Due to the There Will Be Blood fame....
He said in an an interview that a lot of times when he's at a restaurant, people send him milkshakes (to pay homage to the milkshake scene) and he says he's lactose intolerant. He's probably facepalming, thinking 'this is what I may be remembered for'. I hope he has a long, successful career and can move on from Their Will Be Blood, even though it was a 9/10 movie!
"They blamed me for everything. A guy tripped over a banana peel,they'd bring me in."
Nicky - Casino