Trivia: Sullivan was originally going to be called Johnson. The name change was suggested by an animator who had attended Texas A&M University, inspired by one of Texas A&M's historic icons, Lawrence Sullivan Ross, known affectionately by students as "Sully." Ross saved the school from closure in the 1890s and had previously been the Governor of Texas.
Trivia: The Hidden City Cafe was a real place in Port Richmond, California. At a dinner in 1994, a group of Pixar guys came up with the ideas for Monster's Inc, Wall-E, A Bug's Life and Finding Nemo. (Source: MTV).
Answer: He's not as much surprised as he is pleased to see her. She's going to be a little older than when he last saw her because it took Mike so long to rebuild the door. So if he's surprised, it may be at how much she's grown in that time period.
MovieFan612