X2 Easter Egg - The Professor

In Scene 10, at about 28:40 into the movie, Jean Grey says of Nightcrawler, "I'd rather get him back to the Professor." Nightcrawler then says, "The Professor?" Aside from referring to Professor Charles Xavier, in the comics "the Professor" was the enigmatic head scientist of the Weapon X project, which gave Wolverine his adamantium. In the movie, the Professor was partially incorporated into the character of Stryker, and we later find out that Nightcrawler did have contact with Stryker. So, while Nightcrawler has no reason to know Professor Xavier, in a sense he does know "the Professor."