Ness Wadia, Preity Zinta's then-boyfriend, was in Australia during the last lap of shooting, and appears in the movie. He is the man sitting next to her on the bus near the end.
During the scene at the bar when Ron and Nick are having a drink, Ron receives a call and leaves. Nick picks up his glass & drinks from it, however the glass is empty beforehand and his reaction is made out as if he's gulped a shot of whiskey.